William married Mary Spencer before 1717 in Ireland. Mary was born in Ireland; died on 16 Jun 1776 in Harpswell, Cumberland, Maine, United States. [Group Sheet] [Family Chart]

1. Hannah Nancy McKness was born in 1720 in Ireland; died on 16 Sep 1801 in Topsham, Lincoln, Maine, United States; was buried in Topsham, Lincoln, Maine.
2. Sarah McNeiss was born in 1718 in Ireland; died on 18 Mar 1785 in Topsham, Sagadahoc, Maine; was buried in 1St Parish Cem., Topsham, Sagadahoc, Maine.