James Dilworth (1520 – August 23, 1578) was the 13th great-grandfather of Cometan, classified as one of Cometan’s distant maternal ancestors in the Prescott family line. Born in Woodplumpton, Lancashire, James was the son of James Dilworth I (1500 – 1549) and Isabel Savile and the husband of Elizabeth Colton (1540 – 1575). Together, James and Elizabeth raised a daughter named Alice (1557 – 1625) who would go on to marry the clockmaker Sir Robert Moone to become Lady Alice Moone. James is understood to have died in Chipping in Lancashire when he was fifty-eight years of age.
In Cometanic ancestry, James is classified as part of the 15th generation retrograde, thus categorising him as a distant ancestor of Cometan.