I believe Hitler had an English born nephew who regularly toured the USA before the war giving lectures about his uncle. He changed his name at the outbreak of the war and even served in the US Navy towards the end of WWII. Three of this man's four sons still live in the USA, but none have reclaimed the Hitler surname.
Another branch of the Hitler family, again in the USA, have sued for access to the proceeds of Hitler's estate, particularly the rights to Hitler's book, Mein Kampf.