Mary was born about 1780, the daughter of unknown parents. The place is not known.
Her husband was John Tilley, who she married on 20 NOV 1806 in Dawley Magna, Shropshire, England. Their five known children were John Cotton (c1807-?), Eliza (c1809-1888), Mary Anne (c1812-?), William Sampson (c1814-?) and Sarah Elizabeth (c1815-1822).