Mac ind Óclaich was the surname of a Gaelic-Irish erenagh and brehon family. They were based in Killary Harbour, between what is now County Mayo and County Galway.
See also
Aengus Mac ind Oclaich, Archdeacon of Killery, rested in Christ, 1362 Master Florint Mac in Oclaich died this year, 1366
External links http://www.ucc.ie/celt/published/T100011/index.html