"The names of the seven sons were Fib, Fidach, Foltlaig, Fortrenn, Caitt, Ce and Circinn. Fib is equated with Fife, the site of Fidach is uncertain, the others being Athfotla, Fortriu, Caithness, Aberdeenshire and Angus respectively."
My dad had a brother (who died in his teens) who was named Angus. I've never known or heard of anyone else named Angus and my father had no idea of its origin. Hmmmm
Hey, maybe you're part Pict/Hakka! :) Is your father's family Scottish?
Here's some more on the name "Angus":