Tadhg Riabhach Ó Dubhda

Tadhg Riabhach Ó Dubhda was King of Uí Fiachrach Muaidhe.
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''