(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 and the brother of either Keldar or Ishka. 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".