Thomas Willan (c. 1460 – ????) was an English farmer and the 16th great-grandfather of Cometan, classified as one of Cometan’s distant paternal ancestors in the McKerney family line. Born in Sedbergh, Yorkshire (in modern-day Cumbria), all that is known of Thomas’s life is that he was the father of Robert Willan who was born in 1483. The identities of Thomas’s wife and his parents remains unknown, although he likely inherited the Willanhouses farm (now called Willan’s Farm) from his father.
In Cometanic ancestry, Thomas is categorised as part of the 18th generation retrograde, classifying him as a distant ancestor of Cometan.