Hi Sharon,

I sent the information to Fred already, but for information.
Hannah Harvey is most probably:

(Baptism register of St.Philips Anglican , Weston.
Hannah Margaret d/o Barbara and Robert Harvey, labourer, Etobicoke, born July 17, 1840, bap. Dec. 27, 1856, clergy Sponsors: : James and Wm Irvine and Mrs Wadsworth

When Barbara Christner, sister of Nancy was married to Robert Harvery was married in St.James

15 May, 1832, by license, Robert HARVEY, of the township of Etobicoke, bachelor, Barbara CHRISTNER, of the same township. Witnesses, James DEVINS, Lancy DEVINS.[Lancy is probably Laney or Helen Devins, nee Christner]

When Mary Jane Christner married William Irvine at St.Andrews, Roger Lever was a witness.

Would not be unusual to have a niece living with them.