Bria is not a proper name, but sounds like it could be a pretty nickname for Brianna. It's not terrible, but definitely not enough to be its own stand alone name.
If you like the sound of it then I would suggest you use Brianna as the full and proper name and then call her Bria as an endearment.
I really like it! I think it's pretty and would carry nicely through life. I do not think you need to expand it to Brianna to use it. It works on its own
Married:09/27/14
Baby N-Born:10/29/15 Our Angel: EDD: 05/11/17. MC at 6 weeks Baby #2- EDD: 07/18/17
I have a cousin named Briann, they called her Bri often. It's pretty but nms...However, I don't see anything wrong with it as a full name. Go with what you like. What would be your impression of the name if you heard it on someone else? Try to be objective it helps, I'm indecisive about a couple of names right now so I know what it's like. Good luck!
Re: Girl name
Our Angel: EDD: 05/11/17. MC at 6 weeks
Baby #2- EDD: 07/18/17