Mary Kneen is most likely only child of Edmund Kneen + Cath Cotteman - Edmund bur Ger 1782-10-10 and Cath Ger 1819-02-17 - it is likely that widow cath was the 2nd adult female in the household of Wm Corkill (2nd #116 - see manxnotebook) in peel census of 1814
(Edmund Kneen was a widower at this marriage)