Aodh Mac Cathmhaoil, O.F.M., (Latin: Hugo Cavellus; anglicised: Hugh MacCaghwell) (1571 – 22 September 1626), was an Irish Franciscan theologian and Archbishop of Armagh. He was known by Irish speakers at Louvain by the honorary name "Aodh Mac Aingil" ("Mac Aingil" is Irish for "Son of an Angel"), and it was under this title that he published the Irish work "Scáthán Shacramuinte na hAthridhe".
Aodh Mac Cathmhaoil was born in 1570.