Proper noun
McDuff (plural McDuffs)
A surname from Scottish Gaelic.
Emerson became interested in the Hammond organ after hearing jazz organist Jack McDuff perform "Rock Candy", and the Hammond became his instrument of choice in the late 1960s. Source: Internet
In 1966, Hansson saw American jazz organist Jack McDuff perform at Stockholm's Gyllene Cirkeln Club, and was so captivated by the performance that he decided to leave The Merrymen to expand his musical horizons. Source: Internet
His father John Paul, Sr. was a gardener at Arbigland, and his mother was named Jean McDuff (1708–1767). Source: Internet