When William Craig was born in 1728, in Monmouth, New Jersey, British Colonial America, his father, Archibald Craig, was 50 and his mother, Mary Millar, was 46. He married Eleanor Rhea on 28 May 1753, in Freehold Township, Monmouth, New Jersey, United States. They were the parents of at least 7 sons and 7 daughters. He registered for military service in 1776. He died on 18 October 1806, in Monmouth, New Jersey, United States, at the age of 78, and was buried in Old Tennent Churchyard, Tennent, Monmouth, New Jersey, United States.
Scottish: topographic name for someone who lived near a steep or precipitous rock, Older Scots crag, craig. Compare the synonymous English Cragg .
Manx: either a shortened form of Gaelic Mac Concharraige ‘son of Cu Charraige (‘hound of the rock’) or possibly of Mac Thorveig ‘son of Thorveig’, from the Old Norse personal name Thórveig (from the god's name Thórr + veig ‘pith, strength’).