Tadhg Riabhach Ó Dubhda, King of Uí Fiachrach Muaidhe, died 1432.
Tadhg Riabhach is the last Ó Dubhda expressly listed as King of Uí Fiachrach Muaidhe in any contemporary or near-contemporary document. Araile do fhlathaibh Ua nDubhda says of him:
Tadhg Riabhach Ua Dubhda mac Domnaill Clerigh, ri Ua fFiachrach, d'écc in Esgir Abhann iar fflaithius 15 bliadhan. Ingean Uí Maille mathair Ruaidrí remhráite agus an Taidcc-si ("Tadhg Riabhach Ó Dubhda s. Domhnall Cléireach, king of Uí Fhiachrach, died in Eiscir Abhann after a reign of 15 years. The daughter of Ó Máille was the mother of Ruaidhrí" (Ruaidhrí Ó Dubhda) "aforementioned and of this Tadhg.")
