"The Bet Agron International Center in Jerusalem interviewed Arafat's brother and sister, who described the Mufti as a cousin (family member) with tremendous influence on young Yassir after the Mufti returned from Berlin to Cairo. Yasser Arafat himself keeps his exact lineage and birthplace secret. Saddam Hussein was raised in the house of his uncle Khayrallah Tulfah, who was a leader in the Mufti's pro-Nazi coup in Iraq in May 1941."
source:
http://www.eretzyisroel.org/~jkatz/husseini.html