I'd argue, in my etymosophical way, that Bran and Bride are pretty much one and the same, though. I expect to be shot down in flames on that one, mind! ;)
I won't shoot anyone down, yet I believe Bran and bride both have poetical lineage, although Bran means Raven and Bride is from 'Brigh' meaning 'power, 'fiery arrow' etc.