Sir Henry de Velville - What evidence

Probably not any. The only illegitimate child of Henry's was Roland de Velville. Whoever posted the profile was probably just confused about the names.

Disconnecting. If anyone disagrees they can contact me later.

Thanks, Justin!

Henry VII of England is your 15th great grandfather.
You
→ Geneive Melba Hicks
your mother → Ossie Mae Emerson
her mother → Maudie Mae Pratt
her mother → Margaret Frances Crawshaw
her mother → Sarah E Brown
her mother → Mary Julia White Wallace
her mother → Joel Nixon
her father → Rebekah Elizabeth Nixon
his mother → Caleb Robert Todd
her father → Joshua Todd
his father → Joseph Tudor Todd
his father → John Todd, of Bermuda
his father → Mary Todd
his mother → Owen Tudor, Sr.
her father → Jane de Velville
his mother → Sir Roland Velville, of Beaumaris
her father → Henry VII of England
his father

You can pick your nose, but you can't pick your relatives. Henry VII isn't one I would have wanted, but your mileage may vary. (IMHO Kipling had his number in the story "The Wrong Thing" https://www.telelib.com/authors/K/KiplingRudyard/prose/RewardsFarie... .)