(written from a Production point of view)
Pax was a Ferengi mentioned in the script of "Body Parts", but not in the final episode. He was the uncle of Quark and Rom. By the 2370s, Pax had amounted a considerable fortune in the waste extraction business on Ferenginar. While this made him a respected man in Ferengi society, Rom refered to him as "Uncle Stinky".