Hi! I'd appreciate any info anyone might have on the Gaelic (?) name Tressach, which I'm given to understand is a root for the modern name Tracy.
I'm using it in a story and, being a complete Gaelic beginner I'd really just like to check for certain that Tressach is a valid name, and, importantly, if it is the male form. The character's male- I definitely don't want to mess that up!

The sites I've found so far also seem to agree that it means 'warlike, fierce'. Does anyone know if this is accurate? Any other meanings or info about the name would be greatly appreciated!
Thank you!