Fenwick Avenue probably honours the Fenwick family. On Thursday December 29, 1808 James Fenwick of Markham married Eleanor Thomson of Scarborough in St. James Anglican Church, York. James was an officer in the 3rd York Militia. Eleanor was a member of the Thomson family, founders of Scarborough. Their descendants to the fifth generation lived in Toronto in 1898. Their son, William Green Fenwick, was baptized at St. James’ on March 7, 1810. The sponsors were Hugh Thomson and Mary Thomson. In 1907 William H. Fenwick, a cartage agent at 286 King Street East, lived at 507 Logan Avenue.