http://www.cslib.org/gov/wyllysg.htm

Wyllys is a famous family in Connecticut. George Wyllys was Governor of the Colony of Connecticut 1642. Mary Wyllys was his granddaughter.

All the descendants of Mary Wyllys Eliot who took the name "Wyllys" - usually as a middle name - spelled it Wyllys.

Rev Joseph Eliot was the son of a famous early American - Rev. John Eliot, Apostle to the Indians and his wife was the granddaughter of another famous early American. Their descendants carried both surnames frequently, out of pride in their ancestors.