Edgar or Étgar mac Maíl Choluim, nicknamed Probus, "the Valiant” (c. 1074 – 8 January 1107), is king of Alba from 1097 to 1107.

He is the fourth son of Malcolm III (Máel Coluim mac Donnchada) and Margaret of Wessex (later Saint Margaret) but the first to be considered eligible for the throne after the death of his father.