I have a Jane MUMBY (1829-1925)married to William ERRINGTON (1820-1901) of Dundela, Matilda Twp, Dundas County.They married 28 Oct 1846 in Matilda twp. Jane was the daughter of John MUMBY and Ellizabeth? Her sister, Mary Anne MUMBY married Allan McINTOSH of Dundela of McIntosh apple fame. There was a William MUMBY in Williamsburg, Dundas County ca 1840, then he disappears. There is a William married to Orillia in Edwardsburgh , Grenville County, having Urias Irvine baptised 12 Jan 1849 in Wesleyan Methodist records.Don't know if he is the same one or even if these Williams connect to the known daughters.
John MUMBY himself left the area because of money owning to some Williamsburgh Merchants. (Archives of Ontario. Rose vs MUMBY dated 22 Feb 1848.) Anything on this MUMBY family appreciated.