Colin Petersen, the Bee Gees original drummer in the 1960s, died Monday at the age of 78, and Dennis Bryon, 76, who was the drummer during the 1970s disco era, died on Nov. 14.

The Bee Gees are a musical group that was originally made up of three brothers: Barry, Robin, and Maurice Gibb. The trio was successful for most of their 40-plus years of recording music, but they had ...