William married Carminow, Lady Joan in 1307 in Trenoweth, Cornwall, England. Joan (daughter of Carminow, Sir Roger II and Dinham, Lady Joanna) was born on 2 Feb 1286 in Trelowith Manor, St. Mewan, Cornwall, England; died on 5 Jun 1349 in Whalesborough, Cornwall, England. [Group Sheet] [Family Chart]

1. Whalesborough, John I was born in Sep 1289 in Lancarfe Manor, Bodmin, Cornwall, England; died on 26 Apr 1362 in Lancarfe Manor, Bodmin, Cornwall, England.
2. Whalesbourgh, Lady Isabel was born in 1316 in Trigg Manor (Historical), Modbury, Devon, England; died in 1337 in Devon, England.