What is "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.
• Saint Dubtach Bishop of Armagh, Ireland from 536 to 548