Wolfgang Ísbiǫrn McClellan (January 20, 1820-June 23, 1923) was a Chawosaurian wizard and a Chawosaurian graduate from Hogwarts School of Witchcraft and Wizardry. Wolfgang is known to have been the father of former Chawosaurian Prime Minister Theodore McClellan and Wizarding Auror Wolfgang Ísbiǫrn McClellan II. Wolfgang was accepted to Hogwarts in 1931 and was sorted to the House of Gryffindor.

Wolfgang McClellan played an important role in Theodore McClellan's early life, Wolfgang inspired Theodore to get engaged in Chawosaurian politics and along with Theodore's Cherokee mother, Sequoia McDaniels, also Wolfgang's wife, Wolfgang allowed Theodore to travel to Scotland and helped Wolfgang enter Oxford University.