Does anyone know any irish (Celtic or Gaelic mythlology) with the name bryan in it?

Question

I'm writing a story and my main character's ask his mom where did she come up with his name

Answer 1

It's believed to come from the Old Celtic 'bre' which means hill. By extension it's also associated with noble or king (as in a high position).

Brian Boru certainly made the name very popular in the second millenia and he actually started the surname O' Brien.

Answer 2

Brian is a Gaelic name, the BrYan is a modern spelling that actually annoys more people as it does not look right.

The irish for hill is cnoc.

Answer 3

not Bryan... but Brian Boru is a famous King of Ireland.