Henry Moon (February 4, 1639 – July 25, 1705) was the 9th great-grandfather of Cometan, classified as one of Cometan’s distant maternal ancestors in the Prescott family line. Born in Plumpton-Wood (now Woodplumpton) in Lancashire, Henry was the son of Robert Moon and Alice Porter and the husband of Dorothy Grimbaldeston. He is recorded as having died at the age of sixty-six in Catforth, Lancashire and to have fathered at least one son named Robert Moon. Henry married his wife Dorothy in 1669 at the age of thirty.
In Cometanic ancestry, Henry is classified as part of the 11th generation retrograde, thus categorising him as an ancestor of Cometan.