Turns out he was born in Scotland.
Was kidnapped when he was sixteen and sold into slavery.
Ended up in Ireland as the slave of cruel pagan master.
Escaped after six years of after being advised to do so by his guardian angel.
Studied under St. Germain and became a priest.
He accompanied the great Saint on many missions but longed to return to Ireland to evangelize.
The saint, however, would not, as yet, descend from the mountain. He had vanquished the demons, but he would now wrestle with God Himself, like Jacob of old, to secure the spiritual interests of his people. The angel had announced to him that, to reward his fidelity in prayer and penance, as many of his people would be gathered into heaven as would cover the land and sea as far as his vision could reach. Far more ample, however, were the aspirations of the saint, and he resolved to persevere in fasting and prayer until the fullest measure of his petition was granted. Again and again the angel came to comfort him, announcing new concessions; but all these would not suffice. He would not relinquish his post on the mountain, or relax his penance, until all were granted. At length the message came that his prayers were heard:
• many souls would be free from the pains of purgatory through his intercession;
• whoever in the spirit of penance would recite his hymn before death would attain the heavenly reward;
• barbarian hordes would never obtain sway in his Church;
• seven years before the Judgement Day, the sea would spread over Ireland to save its people from the temptations and terrors of the Antichrist; and
• greatest blessing of all, Patrick himself should be deputed to judge the whole Irish race on the last day.
So it required big prayers and big penance and he was up to the task.