In the original three Dune novels, it is mentioned numerous times that Stilgar - Naib of Sietch Tabr and Paul's Fremen mentor/friend - is uncle to Chani, Paul's wife. However, Chani is the daughter of Liet Kynes, the Imperial planetologist from the first novel. So... that means that Stilgar is either A) the brother of Kynes, or B) the brother of Chani's mother. But which one? I'm guessing it's the latter, since him being Liet's brother should have been a plot point in the first novel.
Was Stilgar related to Chani on the paternal or maternal side?