I am looking for the descendants and ancestors of William Joseph Halley (son of Catherine) and his wife Margaret Alcox.

William Joseph Halley was born 8 Jun 1840 in Ireland and died 12 Feb 1906 in Toronto, Ontario.

Margaret Alcox-Halley was born 27 Apr 1837 in Ireland and died 28 Jun 1913 in Toronto, Ontario.

I am aware of five of their children:
William Joseph - b. Sep. 1867 in Ontario, probably Toronto - married to Mary Belle Creagh - they had at least four children: Margarite, Muriel, Monica and Theresa

Katherine E. - my great-grandmother - b. 5 Nov. 1869 in Ontario, probably Toronto - married Frederick R. Gooderham

Margaret Theresa - 20 Nov 1870 in Toronto, Ontario - married Heny Bannister - not aware of any children

Charles John Halley - 29 Sep 1873 - probably never married and probably no offspring

Selina Halley - b. 1874 in Ontario - died as a child.

Many of the above are buried in the Halley family plot in St. Michael's Cemetery (Catholic) in downtown Toronto.