William Mar Of Mar V Earl

William Mar was born in 1222 in , , , Scotland.  William Mar's father was Duncan Of Mar IV Earl.  His paternal grandfather was Morgund MacGylocher Of Mar Earl and his paternal grandmother is Agnes (). He had a sister named Margaret.  He died before July 25th, 1281.  He was buried in 1281.

‌William Mar and Elizabeth were married in a religious ceremony about 1242 in Kildrummy, , , Scotland.  They had a son named Donald Mar.