Seán Mór Ó Dubhagáin

Seán Mór Ó Dubhagáin (died 1372) was an Irish Gaelic poet.

Ó Dubhagáinn was among the first notable members of the bardic family Baile Uí Dhubhagáin (Ballyduggan), near Loughrea, County Galway. He was accorded the rank ollamh seanchai (professional historian) to the Uí Maine recorded Irish clan history up until the Norman invasion of Ireland.

Ó Dubhagáin's most important work is Triallam timcheall na Fodla, a compilation of verse, giving the names of the various tribes, dynasties and territories of the Irish, and the various chiefs before the coming of the Normans. He devotes 152 lines to Meath, 354 to Ulster, 328 to Connacht, and only 56 to Leinster, possibly unfinished at his death.

Triamllam is notable, in that he writes as though the Norman invasion never occurred, and as if many of the families listed still occupied their original territories. This, however, may reflect his interest as an antiquarian preserving ancient lore.

His contemporary, Giolla na Naomh Ó hUidhrín (died 1420), completed it. In Cambrensis Eversus, John Lynch says that he could not find "any better source than this remarkable poem" concerning the chief Irish families before the coming of the English. Ó Dubhagáin was the author of several other extant poems, all more or less in the nature of a memoria technica, valuable chiefly for their facts about the kings of Ireland and of the provinces. They include:

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