Dubthach

Dubthach is a masculine personal name in early Ireland. It may refer to:


 * Dubthach Dóeltenga, a character in the Ulster Cycle, ally of Fergus
 * Dubthach maccu Lugair, legendary Irish poet and lawyer in the time of St Patrick
 * Dubthach the First, Bishop of Armagh, Ireland from 497 to 513.
 * Dubthach the Second, Bishop of Armagh, Ireland from 536 to 548