German heavy-metal vocalist, born 6 April 1952 in Wuppertal, Germany. He's the older brother of Peter Dirkschneider and the father of Sven Dirkschneider.
Icon of metal band Accept, leaving in 1987, and formed [a=U.D.O. (2)].
http://en.wikipedia.org/wiki/Udo_Dirkschneider
https://de.wikipedia.org/wiki/Udo_Dirkschneider