Sheila, Chuck Berry was a seminal Rock'n'Roller who wrote his own songs and had a distinctive style of guitar riff (copied by the Beach Boys for the intro to "Fun, Fun, Fun"). Some of his better-known songs are "Roll Over Beethoven", "Rock and Roll Music" (both covered by the Beatles), "Sweet Little Sixteen" (which tune the Beach Boys used for "Surfing USA"), "Maybellene" (sp?), "Johnny B. Goode", and later (embarassingly) "My Dingaling".

Richard Berry, as far as I know, is known only for writing "Louie, Louie". I'm pretty sure the two men are not related.