Gaelic male name derived from the names Teague and Tadhg - all Gaelic forms of Timothy. Meaning attractive, wise poet, philosopher, king. Alternative spellings Teaghan, Teighan, Tegan.

This was also the name of an 11th-century king of Connacht. Tadhg is most common in south-west Ireland, particularly in County Cork and County Kerry. The name has enjoyed a surge in popularity recently, becoming the 64th most common name for baby boys in 2006 according to the Central Statistics Office in Ireland.