Dennis Ronald Bryon was a Welsh rock drummer from Cardiff, best known for his work with the Bee Gees from 1974 to 1980. Bryon and Ringo Starr are the only drummers to have five songs in the top ten Billboard chart simultaneously. From Wikipedia
Dennis Bryon and Colin Petersen, who played pivotal roles in different eras of the Bee Gees, have passed away within days of each other.