Wijerd Jelckama (also spelled Wierd and Wijard) (c. 1490–1523) was a Frisian military commander, warlord and member of the Arumer Zwarte Hoop ("Arumer Black Hope"). He was the lieutenant of Pier Gerlofs Donia (also known as Grutte Pier) and fought along his side against the Saxon and Hollandic invaders. Jelckama took Donia's place as freedom fighter after Donia died in 1520.