St Patrick, whom the Manx own for their apostle.

The tradition the Manx sources follow is that he converted the Island about the year 447 and left one Germanus as its bishop. Camden had placed the institution of the see elsewhere, and his Manx editors confute him on the authority of both the Irish and the Manx tradition of the first conversion, and of all the historians who have written Patrick's life. Germanus settled the Christian religion in the Island, and the account adds that it never afterwards relapsed. Those who refused Patrick banished from the Island, and after three years he went over to Ireland. When Germanus died he sent two more bishops, Conindrius and Romulus, of whom the tradition says little except that one or both of them survived Patrick by five years, which puts it at 494.

He displaced the older order. Mannanan, the pagan who reigned many years and kept the Island under a mist by his necromancy, and who could make one man seem a hundred if he dreaded an enemy, is said to have been converted to Christianity by St Patrick.

His name is on the Island still. Peel Castle stands on St Patrick's Isle, and the Manx weather sayings set his day against St Bridget's: if the bird crow on Bride's day, she will cry before St Patrick's day.