**Exhibit 21**

** **

**WATSON WYATT WORLDWIDE, INC.**

 

**SUBSIDIARIES**

 

**(3-31-09)**

 
| **SUBSIDIARY NAME**                                  | ** ** | **JURISDICTION OF  INCORPORATION/  ORGANIZATION** | ** ** | **Name(s) under  which such  subsidiary  does business  (if  different)(a)** |
|-----------------------------------------------------------|------------|--------------------------------------------------------|------------|---------------------------------------------------------------------------------------------|
|                                                      |       |                                                   |       |                                                                                        |
| Watson  Wyatt Argentina S.A.                              |       | Argentina                                              |       |                                                                                        |
| Marcu &  Asociados S.A.                          |       | Argentina                                              |       |                                                                                        |
| Watson  Wyatt Australia Pty Ltd                           |       | Australia                                              |       |                                                                                        |
| Wycomp  Pty Ltd                                           |       | Australia                                              |       |                                                                                        |
| Watson  Wyatt Superannuation Pty Ltd                      |       | Australia                                              |       |                                                                                        |
| Watson  Wyatt (Austria) GmbH                              |       | Austria                                                |       |                                                                                        |
| Watson  Wyatt Insurance and Financial Services SA         |       | Belgium                                                |       |                                                                                        |
| Watson  Wyatt NV                                          |       | Belgium                                                |       |                                                                                        |
| Watson  Wyatt Brasil Ltda                                 |       | Brazil                                                 |       |                                                                                        |
| Watson  Wyatt Canada ULC                                  |       | Canada                                                 |       |                                                                                        |
| Watson  Wyatt Chile S.A.                                  |       | Chile                                                  |       |                                                                                        |
| Corredores  de Seguros Watson Wyatt Limitada              |       | Chile                                                  |       |                                                                                        |
| Watson  Wyatt Consultancy (Shanghai) Ltd                  |       | China                                                  |       |                                                                                        |
| Watson  Wyatt Consultancy (Shenzhen) Ltd                  |       | China                                                  |       |                                                                                        |
| Watson  Wyatt Consultores Colombia S.A.                   |       | Colombia                                               |       |                                                                                        |
| Watson  Wyatt & Company                          |       | Delaware                                               |       |                                                                                        |
| Wyatt  Data Services, Inc.                           |       | Delaware                                               |       |                                                                                        |
| Watson  Wyatt Investment Consulting, Inc.            |       | Delaware                                               |       |                                                                                        |
| Watson  Wyatt Insurance Consulting, Inc.             |       | Delaware                                               |       |                                                                                        |
| Watson  Wyatt Insurance and Financial Services, Inc. |       | Delaware                                               |       |                                                                                        |
| Watson  Wyatt Canadian Holdings, Inc.                |       | Delaware                                               |       |                                                                                        |

 

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| Watson  Wyatt European Investment Holdings, Inc.   |   | Delaware   |   |   |
|---------------------------------------------------------|--------|------------|--------|--------|
| Watson  Wyatt European Investment Holdings 1, LLC       |   | Delaware   |   |   |
| Watson  Wyatt European Investment Holdings 2, LLC       |   | Delaware   |   |   |
| Watson  Wyatt SARL                                      |   | France     |   |   |
| Watson  Wyatt Heissmann (Düsseldorf) GmbH          |   | Germany    |   |   |
| Watson  Wyatt Heissmann (München-Frankfurt) GmbH   |   | Germany    |   |   |
| Watson  Wyatt Insurance Consulting GmbH                 |   | Germany    |   |   |
| Watson  Wyatt Heissmann GmbH                            |   | Germany    |   |   |
| Buck  Heissmann Holding GmbH                            |   | Germany    |   |   |
| Buck  Heissmann GmbH                                    |   | Germany    |   |   |
| IPC  Heissmann Versicherungsservice GmbH                |   | Germany    |   |   |
| Verlag  Arbeit Und Alter GmbH                           |   | Germany    |   |   |
| Heissmann  Consultants GmbH                             |   | Germany    |   |   |
| PM&S  Pensions-managment und Sicherungs-Treuhand AG |   | Germany    |   |   |
| Watson  Wyatt Insurance Consulting Ltd                  |   | Hong  Kong |   |   |
| Watson  Wyatt Hong Kong Limited                         |   | Hong  Kong |   |   |
| Watson  Wyatt Investment Consulting Hong Kong Limited   |   | Hong  Kong |   |   |
| Watson  Wyatt Kft                                       |   | Hungary    |   |   |
| Watson  Wyatt Insurance Consulting Private Ltd          |   | India      |   |   |
| Watson  Wyatt India Private Limited                     |   | India      |   |   |
| PT  Watson Wyatt Purbajaga                              |   | Indonesia  |   |   |
| PT  Watson Wyatt Indonesia                              |   | Indonesia  |   |   |
| Watson  Wyatt (Ireland) Limited                         |   | Ireland    |   |   |
| Watson  Wyatt Consulting Limited                        |   | Ireland    |   |   |
| BCI  Trustees Limited                                   |   | Ireland    |   |   |
| Watson  Wyatt Italia Srl                                |   | Italy      |   |   |
| Watson  Wyatt Insurance Consulting KK                   |   | Japan      |   |   |
| Watson  Wyatt KK                                        |   | Japan      |   |   |
| Watson  Wyatt (Malaysia) Sdn Bhd                        |   | Malaysia   |   |   |
| Watson  Wyatt Holdings (Mauritius) Limited              |   | Mauritius  |   |   |
| Watson  Wyatt Mexico, S.A. de C.V.                      |   | Mexico     |   |   |

 

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| Watson  Wyatt European Region BV                                                  |   | Netherlands           |   |   |
|-----------------------------------------------------------------------------------|--------|-----------------------|--------|--------|
| Watson  Wyatt Insurance Consulting BV                                             |   | Netherlands           |   |   |
| Watson  Wyatt BV                                                                  |   | Netherlands           |   |   |
| Watson  Wyatt International, Inc.                                            |   | Nevada                |   |   |
| Watson  Wyatt Philippines, Inc.                                              |   | Philippines           |   |   |
| Watson Wyatt (Portugal) Unipessoal Limitada                                       |   | Portugal              |   |   |
| Watson  Wyatt Puerto Rico, Inc.                                              |   | Puerto  Rico          |   |   |
| WatsonWyatt, Limited Liability Company                                            |   | Russia                |   |   |
| Watson  Wyatt Insurance Consulting Pte Ltd                                        |   | Singapore             |   |   |
| Watson  Wyatt Singapore Pte Ltd                                                   |   | Singapore             |   |   |
| Watson  Wyatt Insurance Consulting (Spain) SA                                     |   | Spain                 |   |   |
| Watson  Wyatt de Espana SA                                                        |   | Spain                 |   |   |
| Watson  Wyatt AB                                                                  |   | Sweden                |   |   |
| Verbier  WW Stockholm AB                                                          |   | Sweden                |   |   |
| Watson  Wyatt AG                                                                  |   | Switzerland           |   |   |
| Buck  Heissmann Sarl                                                              |   | Switzerland           |   |   |
| Watson  Wyatt (Thailand) Limited                                                  |   | Thailand              |   |   |
| Watson  Wyatt Dubai LLC                                                           |   | United  Arab Emirates |   |   |
| Watson  Wyatt Limited                                                             |   | United  Kingdom       |   |   |
| Watson  Wyatt Holdings Limited                                                    |   | United  Kingdom       |   |   |
| Watson  Wyatt Trustees Limited                                                    |   | United  Kingdom       |   |   |
| The  Wyatt Company Holdings Limited                                               |   | United  Kingdom       |   |   |
| Watson  Wyatt Services Limited                                                    |   | United  Kingdom       |   |   |
| Watson  Wyatt Pretium Limited                                                     |   | United  Kingdom       |   |   |
| Watson  Wyatt Holdings (Europe) Limited                                           |   | United  Kingdom       |   |   |
| Watson  Wyatt International Limited                                               |   | United  Kingdom       |   |   |
| Watson  Wyatt Insurance & Financial Services Consulting Holdings Limited |   | United  Kingdom       |   |   |
| Watson  Wyatt European Region Limited                                             |   | United  Kingdom       |   |   |
| Watson  Wyatt European Investment Holdings Limited                                |   | United  Kingdom       |   |   |
| Watsons  Pensioneer Trustees Limited                                              |   | United  Kingdom       |   |   |
| Watson  Wyatt (UK) Acquisitions 1 Limited                                         |   | United  Kingdom       |   |   |

 

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| PCL  Limited                                          |   | United  Kingdom |   |   |
|-------------------------------------------------------|--------|-----------------|--------|--------|
| PCL  1991 Limited                                     |   | United  Kingdom |   |   |
| Wyatt  Trustee Limited                                |   | United  Kingdom |   |   |
| The  Wyatt Company (UK) Limited                       |   | United  Kingdom |   |   |
| Wyatt  Pension Plan Trustee Limited                   |   | United  Kingdom |   |   |
| Wyatt  Financial Services Limited                     |   | United  Kingdom |   |   |
| Watsons  International Limited                        |   | United  Kingdom |   |   |
| RWS  Trustee Limited                                  |   | United  Kingdom |   |   |
| Watson  Wyatt Healthcare Trustees Limited             |   | United  Kingdom |   |   |
| Watson  Wyatt (UK) Acquisitions 2 Limited             |   | United  Kingdom |   |   |
| Watson  Wyatt European Investment Limited Partnership |   | United  Kingdom |   |   |
| Watson  Wyatt Uruguay S.A.                            |   | Uruguay         |   |   |

 

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(a)All of thesesubsidiaries do business under their own name or under the name Watson WyattWorldwide.

 

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