The Scots and the Irish are from the same Tribe. At one time Ireland
was divided into five parts known as the five fifths. Ulster to the north, Munster (south), Leinster (east) Connaught (west) and Mide in the middle
Through the years Ireland became divided almost entirely into two halves and the people of Ulster were pushed to a small coastal strip bordering the Irish Sea. The kingdom changed it's name to Dál Riata. Eventually Dál Riata fell under the rule and influence of the Uí Néill, and were not content with the boundry presented by the sea, launched colonies across the Irish Sea into then Pictish Britain. and that was how Scotland was founded.
St. Columba, the patron saint of Scotland was Irish not Scottish. He was a member of the powerful Irish Dál Riata family and brought Christianity to Scotland in 563 AD. To keep his ties in Ireland he settled on the beautiful Scottish island of Iona, which was close to both Scotland and Ireland.
. . . and St Patrick the person responsible for bringing Christianity to Ireland . . . you probably thought he was Irish . . . No, he was Welsh!!!