(chants) Bren-na, Bren-na, Bren-na!!
I don't really know how to describe this, but I feel like there is a category of names that all sound sing-songy, door-bell-y, etc. Names like Kaleigh, Haley, Bailey and all such rhyming variants fit into that category. Same sith Aiden, Jayden, Caden, etc. And same with Keeley. To me, the feel cutesy, trendy, overused, and annoying.
Brenna on the other hand is intriguing. Similar to the more common Jenna. But still different. A little like Brynn, but more feminine. I definitely vote for Brenna.