Benen grew up in the district around Duleek. He and his family were converted in his childhood and baptized by Saint Patrick. The story is told that Benen

At that moment Benen became the apostle's disciple and companion. We are told that when the apostle wanted to continue his journey, Benen rolled himself into a ball in Patrick's chariot, clung to the saint's feet, and begged to accompany him to Tara. Patrick agreed to take the youngster with him, although everyone else thought he was too immature. Patrick assured them that Benen would be fine-- and he was. He never returned home.
And so, as Benen matured, he became Patrick's confidant, 'Psalmsinger,' and right-hand man. He sang for every Mass said by Patrick, thereby learning how to teach and preach the faith. Eventually Benen was ordained priest, and in time succeeded Patrick as archbishop of Ireland. Benen is known for his gentleness, charm, and beautiful singing voice.