I asked ChatGPT the following question:

I would like to know what the origin is of the name Kiffin.

And this is the answer it gave me:

The name "Kiffin" is of Welsh origin. It is believed to be a variant of the surname "Kiffith," which itself may be derived from the Welsh word "cyffin," meaning "border" or "boundary." This suggests that the name could have originally referred to someone who lived near a boundary or border area, likely in Wales or the Welsh Marches, which is the border region between Wales and England.

Kiffin is also associated with early Puritan settlers, most notably William Kiffin, a prominent 17th-century English Baptist pastor and supporter of religious tolerance. While the name itself may not be widely used today, it has historical significance, particularly in religious and colonial contexts.