Tomás mac Aodh Mág Samhradháin, head of the McGovern lineage and Baron or Lord of Tullyhaw barony, County Cavan from 1269 to 1272.
In 1269 he murdered his half-brother or step-brother, Donnchadh ‘Cime’ Mág Samhradháin, in an internecine struggle for the chieftaincy.
[2] The Annals of the Four Masters 1272 state- Donough, son of Gilla-na-naev Magauran, was slain by his brother Thomas.
[4] Tomás was killed in 1272 A.D. in an encounter with the Cenel Luachain clan of Oughteragh parish, barony of Carrigallen, County Leitrim.
[4] The Annals of Connacht 1275 state- Tomas Mag Samradain was killed by the Cenel Luachain.