Giles' parents are uncertain. Rootsweb shows a variety of alternatives with no real documentation of anyone. Immigrant Henry Smith (m. Ann Pynchon) would be his contemporary, as he married and began having children in the late 1630s.
Society of the Descendants of the Founders of Hartford, .
Giles Smith, an inhabitant who received land “by the courtesie of the town;” his home-lot in 1639 was on Main St., on the corner of what is now Charter Oak St., a small lot cut off from the square occupied by George Wyllys. He sold 20 acres to Thomas Hosmer, March 6, 1642; Philip Davis bought his land and tenement. He was one of the earliest settlers at New London, but removed from them to Fairfield, where he was in 1651 ; d. there, 1669 ; he left a second wife, Eunice, not the mother of his children, who had been widow of Jonathan Porter, of Huntington, L. I.