Mary Wightman / John Fisher, Yorkshire

Looking for information on the parents and or children of John Fisher and Mary Wightman (Whitman) from Yorkshire, England. Known children are Millicent Fisher b. Nov 13, 1857 and Thomas G. Fisher b. abt 1860. Both Millicent and Thomas were found in the 1901 Census for North Toronto, Ontario, Canada. Any information would be appreciated.