Cushion Pillow

Where does the word “cushion” (also known as a pillow) come from?

Does it come from something British? Or does it come from the name of the Muslim Prince/King with the same name that fought together with Eton in the 1700’s or 1800’s in Egypt?

“From Old French coissin (modern coussin), ultimately from Latin coxa ‘hip, thigh’.”

How To Measure a Throw Pillow from Cushion Source