Re: your last name is Khan, really?
Shahrukh Khan’s father was an ethnic Pathan, from Peshawar. He moved to Delhi in 1947, after partition. His mother was Hyderabadi.
Not sure about the other “khan” actors, but I know Aamir Khan’s surname is actually “Hussain”…His father Tahir Hussain and his uncle Nasir Hussain…I think the Khan moniker was added with his generation.