ConnectU (originally HarvardConnection) was a social networking website launched on May 21, 2004, that was founded by Harvard students Cameron Winklevoss, Tyler Winklevoss, and Divya Narendra in December 2002.
 Users could add people as friends, send them messages, and update their personal profiles to notify friends about themselves.
 Users were placed in networks based upon the domain name associated with the email address they used for registration.
Divya Narendra ( ; born March 18, 1982) is an American businessman.
 He is the CEO and co-founder of SumZero along with Harvard classmate Aalap Mahadevia.
 He also co-founded HarvardConnection (later renamed ConnectU) with Harvard University classmates Cameron Winklevoss and Tyler Winklevoss.
Heather Mary Stanning OBE (born 26 January 1985) is a retired British professional rower, a member of the Great Britain Rowing Team, and Royal Artillery officer.
 Ranked number 1 female rower in the world since 2016, she is a double Olympic champion, double World champion, quadruple World Cup champion and double European champion.
 As of May 2015 she and her partner Helen Glover are the World, Olympic, World Cup and European record holders, plus the reigning Olympic, World, and European champions in the women's coxless pairs.
 She has also been a British champion in both women's fours and quad sculls.
Winklevoss Capital is a family office founded in 2012 by Tyler Winklevoss and Cameron Winklevoss.
 The firm invests across many asset classes with an emphasis on providing seed funding and infrastructure to early-stage startups.
 The company is headquartered in New York’s Flatiron District.
Helen Glover MBE (born 17 June 1986) is a British professional rower and a member of the Great Britain Rowing Team.
 Ranked the number 1 female rower in the world since 2015, she is a two time Olympic champion, triple World champion, quintuple World Cup champion and triple European champion.
 As of June 2016, she and her partner Heather Stanning are the World, Olympic, World Cup and European record holders, plus the reigning Olympic, World and European champions in the women's coxless pairs.
 She has also been a British champion in both women's fours and quad sculls.
Mark Gerban is a former professional rower.
 He is notable as the first rower in history to represent the State of Palestine at the World Championships.
Joseph Henry Sadler (born c. 1839) was a British professional rower who twice won the World Sculling Championship.
 Before 1876, the English Sculling Championship was considered to be the premier event in professional sculling.
 In 1876, the English Title gained the World status and earlier winners were retrospectively given the title of World Champion.
Tyler Howard Winklevoss (born August 21, 1981) is an American rower and entrepreneur.
 He competed in the men's pair rowing event at the 2008 Summer Olympics with his identical twin brother and rowing partner, Cameron Winklevoss.
 Winklevoss co-founded HarvardConnection (later renamed ConnectU) along with his brother Cameron and a Harvard classmate of theirs, Divya Narendra.
 In 2004, the Winklevoss brothers sued Mark Zuckerberg for $65 million, claiming he stole their ConnectU idea to create the much more popular social networking service site Facebook.
Cameron Howard Winklevoss (born August 21, 1981) is an US-American rower and entrepreneur.
 He competed in the men's pair rowing event at the 2008 Beijing Olympics with his identical twin brother and rowing partner, Tyler Winklevoss.
 Cameron and his brother are known for co-founding HarvardConnection (later renamed ConnectU) along with Harvard classmate Divya Narendra.
 In 2004, the Winklevoss brothers sued Facebook founder Mark Zuckerberg for $65 million, claiming he stole their ConnectU idea to create the popular social networking site Facebook.
 In addition to ConnectU, Winklevoss also co-founded the social media website Guest of a Guest with Rachelle Hruska.
The Winklevoss twins (born August 21, 1981; also humorously referred to as the Winklevi or Winklevii) are American rowers and Internet entrepreneurs, Cameron Winklevoss and Tyler Winklevoss.
 They competed in the men's pair rowing event at the 2008 Beijing Olympics.
 They are known for co-founding HarvardConnection (later renamed ConnectU) along with Harvard University classmate Divya Narendra.
 In 2004, the Winklevoss brothers sued Facebook founder Mark Zuckerberg, claiming he stole their ConnectU idea to create the popular social networking site, and ultimately received $65 million.

Question: ConnectU was founded by Cameron Winklevoss, Divya Narendra, and this professional rower?
Answer: Tyler Winklevoss