Tadhg Ó Cianáin

Tadhg Óg Ó Cianáin (Irish pronunciation:) (died c. 1614) was an Irish writer.

He was the author of Turas na dTaoiseach / the Departure of the Lords, a diary of the Flight of the Earls, kept from September 1607 to November 1608, from Rathmullen, County Donegal to Rome. It is the earliest example in Irish of the diary genre.