I've found the family in the special transcriptions of the 1841 Census for Wrexham Town(Clwyd FHS):
Wrexham Regis, Eagles Meadow, ? off Salop Street.
William Hughes, 48, Tinsmith
Mary, 43
Thomas, 21, Tailor
William, 19
Henry, 19
Mary, 14
Edwin, 10
Jane, 7
All born County
So maybe the 1817 marriage is possible.
Gadget