A follower of Cybi, a saint associated with the island of Anglesey in north Wales, Peulan is commemorated in the dedication of the church he reportedly founded, St Peulan's Church, Llanbeulan, on Anglesey.
His dates of birth and death are not recorded, although he is said to have lived in the early part of the 6th century.
[2] Peulan's sister is said to have been Gwenfaen, a saint commemorated in the name of a church at Rhoscolyn, on Holy Island, Anglesey.
His brother was Gwyngeneu, who was also commemorated with a church on Holy Island that no longer exists.
[4] He is venerated as a saint, although he was never canonized by a pope: as the historian Jane Cartwright notes, "In Wales sanctity was locally conferred and none of the medieval Welsh saints appears to have been canonized by the Roman Catholic Church".