Saint Patrick (Latin: Patricius; Irish: Pádraig  was a fifth-century Romano-British Christian missionary and bishop in Ireland. Known as the "Apostle of Ireland", he is the primary patron saint of Ireland, the other patron saints being Brigit of Kildare and Columba. He is venerated in the Catholic Church, the Anglican Communion, the Lutheran Churches, the Old Catholic Church, and in the Eastern Orthodox Church as equal-to-the-apostles and Enlightener of Ireland.~Source  Wikipedia 

That being said  he was said to have written  in his autobiography  (known as the Confessio,) that he was captured as a  young  boy by  Irish buccaneer's from his home in Britain and taken as caring  for  livestock according to  him he lived there for six years before escaping and returning to his kin in Britain, where he became a cleric.

Part 2

St Patrick  Banishes Snakes From  Ireland 

Patrick banishes all snakes from Ireland The absence of snakes in Ireland has been noted from as early as the third century by Gaius Julius Solinus, but later legend has attributed the banishment of all reptiles from the island to Patrick. As Roy Flechner shows in his biography, the earliest text to mention an Irish saint banishing snakes from Ireland is in fact the Life of Saint Columba (chapter 3.23), written in the late seventh or early eighth century.For the earliest written record of a legend about Patrick ridding Ireland of venomous creatures, we must turn to the thirteenth-century Gerald of Wales, who expresses scepticism about the veracity of the story. The hagiographic theme of banishing snakes may draw on the Biblical account of the staff of the prophet Moses. In Exodus 7:8–7:13, Moses and Aaron use their staffs in their struggle with Pharaoh's sorcerers, the staffs of each side turning into snakes. Aaron's snake-staff prevails by consuming the other snakes. However, all evidence suggests that post-glacial Ireland never had snakes. Blessed Be To All ~RavenwinD~ 🌛🌕🌜