Opinions on Our Baby Names?

My boyfriend and I are expecting our first baby in September. Although I know it is way too soon to know the gender of the baby, just playing around my mother did the "pencil test" on me and it says we're having a girl. We're pretty set on our boy name, but for our daughter, we're stuck between three. We both really like Adalyn, and her middle name would be Grayce (I am very fond of the spelling that way) and her nickname would be Ady, which we love. However, we both like the name Brennan, her middle name would be Reese, and we'd call her Bre, which we are both very fond of as well. And, I myself, like Jocelyn...with a middle name undecided. I know we have nine months, almost, to decide...but just curious, opinions guys?