Prince or king
Breandan is an Irish Gaelic name derived from the Old Irish word 'brenainn', which was borrowed from a Welsh word meaning prince. It is the traditional Irish spelling of the name commonly known in English as Brendan. The name was popularized by Saint Brendan the Navigator, a famous 6th-century Irish monk.
Less common today
Breandan isn't in the latest US Top 1000. It last peaked at #6,240 in 2006.
Irish writer and broadcaster
Irish professional dancer and choreographer
Irish scholar and Celticist
US births per 5-year period, 1990–present (SSA data).