Just guessing that Ann is the daughter of Francis, based on her birthdate estimated at about 1816 given her marriage date, and on Francis being a witness to her marriage.
The Marriage Registers of Upper Canada/Canada West, Volume 14, Western District 1786-1856, Compiled by Dan Walker & Fawne Stratford-Devai, Global Heritage Press, Milton:
Marriages by Rev'd Charles Stewart, Regular Baptist Church, Gosfield (p. 14):
David L Darmey, to Ann Wilkinson, both of Mersea. 2 Aug. 1836, by banns. Rev. Stewart. Wit. John Stewart and Francis Wilkinson.
Ann
Wilkinson
Francis Alexander Wilkinson ca 1817-
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