What is "fothad"

Fothad, later Fothadh, is an Old Irish and Scottish Gaelic male given name, meaning "foundation". Bearers include:

• Saint Fothad, 8th century bard and cleric
• Fothad Cairpthech and Fothad Airgthech, legendary joint High Kings of the 3rd century
• Fothad I of Cennrígmonaid, 10th century Scottish supposed bishop
• Fothad II of Cennrígmonaid, 11th century Scottish bishop