Gelelemend (1737–1811) (Lenape), also known as Killbuck or John Killbuck Jr., was an important Delaware (Lenape) chief during the American Revolutionary War, who supported the rebel Americans. His name signifies "a leader." Born into the senior Turtle clan, which had responsibility to lead the tribe, he became principal chief of the Lenape in November 1778, following the death of White Eyes, a war chief and Speaker of the Delaware Head Council.