**Exhibit21.1**

**LIST OFSUBSIDIARIES****OF****ONEBEACON INSURANCEGROUP, LTD.**

**as ofDecember 31, 2006**
| **Subsidiary**                                | ** ** | **Jurisdiction of Incorporation** |
|-----------------------------------------------|------------|-----------------------------------|
| A. W. G. Dewar, Inc.                |       | Massachusetts                     |
| Adirondack AIF, LLC                           |       | New York                          |
| Adirondack Insurance Exchange                 |       | New York                          |
| American Central Insurance Company            |       | Missouri                          |
| American Employers’ Insurance Company    |       | Massachusetts                     |
| Atlantic Specialty Insurance Company          |       | New York                          |
| AutoOne Insurance Agency, Inc.                |       | Delaware                          |
| AutoOne Insurance Company                     |       | New York                          |
| AutoOne Management Company, Inc.              |       | Delaware                          |
| AutoOne Select Insurance Company              |       | New York                          |
| The Camden Fire Insurance Association         |       | New Jersey                        |
| The Employers’ Fire Insurance Company    |       | Massachusetts                     |
| Farmers and Merchants Insurance Company       |       | Oklahoma                          |
| Fund American Companies, Inc.                 |       | Delaware                          |
| Fund American Enterprises Holdings, Inc.      |       | Delaware                          |
| Fund American Financial Services, Inc.        |       | Delaware                          |
| Homeland Insurance Company of New York        |       | New York                          |
| Houston General Insurance Company             |       | Texas                             |
| Houston General Insurance Exchange            |       | Texas                             |
| Houston General Insurance Management Company  |       | Texas                             |
| Massachusetts Homeland Insurance Company      |       | Massachusetts                     |
| Midwestern Insurance Company                  |       | Oklahoma                          |
| Mill Shares Holdings (Bermuda) Ltd.           |       | Bermuda                           |
| National Marine Underwriters, Inc.            |       | Delaware                          |
| New Jersey Skylands Management LLC            |       | Delaware                          |
| New Jersey Skylands Insurance Association     |       | New Jersey                        |
| New Jersey Skylands Insurance Company         |       | New Jersey                        |
| The Northern Assurance Company of America     |       | Massachusetts                     |
| OneBeacon America Insurance Company           |       | Massachusetts                     |
| OneBeacon Holdings (Gibraltar) Limited        |       | Gibraltar                         |
| OneBeacon Holdings (Luxembourg) S.à.r.l. |       | Luxembourg                        |
| OneBeacon Insurance Company                   |       | Pennsylvania                      |
| OneBeacon Insurance Group LLC                 |       | Delaware                          |
| OneBeacon Lloyd’s, Inc.                  |       | Texas                             |
| OneBeacon Lloyd’s of Texas               |       | Texas                             |
| OneBeacon Midwest Insurance Company           |       | Wisconsin                         |
| OneBeacon Professional Partners, Inc.         |       | Delaware                          |
| OneBeacon Risk Management, Inc.               |       | Delaware                          |
| Pennsylvania General Insurance Company        |       | Pennsylvania                      |
| Potomac Insurance Company                     |       | Pennsylvania                      |
| Prospector Partners Turtle Fund               |       | Delaware                          |
| TCH Insurance Agency, Inc.                    |       | Massachusetts                     |
| Traders & General Insurance Company       |       | Texas                             |
| WM Belvaux (Luxembourg) S.à.r.l.         |       | Luxembourg                        |
| WM Findel (Luxembourg) S.à.r.l.          |       | Luxembourg                        |
| WM Kehlen (Luxembourg) S.à.r.l.          |       | Luxembourg                        |
| WM Queensway (Gibraltar) Limited              |       | Gibraltar                         |
| York Insurance Company of Maine               |       | Maine                             |

 

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