Brandan is of Irish origin, derived from the ancient Irish name 'Brandán.' It is believed to have come from the old Celtic word 'brand,' meaning 'sword' or 'spear.' The name Brandan has been popular throughout history, with Saint Brendan the Navigator being one of its most notable figures. He was an Irish monk and navigator who explored the North Atlantic around 500 AD.
"The name Brandan had a notable start with 8 births in 1974 and peaked in popularity in 1985 with 13 births. However, it appears to have declined since then, with a consistent average of around 5 births per year from 1987 onwards."