Simplify the following text for a Grade 6 native English-speaking person.
Original: John Devon Roland Pertwee ( July 7 , 1919 â `` May 20 , 1996 ) , better known as Jon Pertwee , was an English actor .
Simplified: John Devon Roland `` Jon '' Pertwee ( 7 July 1919 â `` 20 May 1996 ) , was an English actor .