Isarn may refer to: Isarn of Pallars (died 948) Isarn, Bishop of Grenoble (950–976) Isarn (troubadours) (), troubadour Isarn (inquisitor) (), inquisitor People with the given name Isarn Marques (), troubadour Isarn Rizol (), troubadour People with the surname William Isarn (died 1010s), Count of Ribagorza See also Isard (disambiguation)