John ("Drumbo") French is an American drummer and musician. He played on Captain Beefheart's "Trout Mask Replica", and also on various other Captain Beefheart records. Captain Beefheart dubbed him "Drumbo". During the "Trout Mask Replica" sessions, French transcribed the musical ideas Beefheart played for him on piano for the rest of the band, thus making him one of the unsung musical geniuses within the Beefheart legend. Wikipedia
The definitive Wikipedia entry for John French. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/John_French_%28musician%29