The Alan part is easy, and the haehnel part just rhymes with anal.
Alan Alan's birth name is Alan Rabinowitz.
Alan Shaxon's birth name is Alan Howson.
Alan Mathis's birth name is Alan Giddens.
Alan Cabal's birth name is Alan Cabal.
Alan Cotton's birth name is Alan Charles Cotton.
Alan Cranston's birth name is Alan MacGregor Cranston.
Alan Schechter's birth name is Louis Alan Schechter.
Alan Silvestri's birth name is Alan Anthony Silvestri.
Alan Skog's birth name is Alan Edward Skog.
Alan Sleath's birth name is Graham Alan Sleath.
Alan Ruck's birth name is Alan D. Ruck.
Alan Saginian's birth name is Alan Patrick Saginian.