Kind of makes you wonder whate the other 90% of Scots are descended from?
The majority racial origin is probably gael (Irish). Theres also going to be a lot of Anglo-Saxon too.
They are all basically the same people. Wave after wave of migrants came out of the Iberian Ice Age refuge at the end of the Ice age and most of them were haplogroup R1b.
Different groups of R1b's arrived at different spots where previous R1b's had settled...different groups have different customs, basically and there was conflict.
Haplogroup R1b(male)
Recently scientists have discovered that R1b's have more male children than female. That accounts for the high percentage (68%) of R1b's in Europe.