We generated large lists of names and would read them off to each other. Both of us just liked the sound of Quinn - felt modern yet traditional, masculine, and so we though, unique. Unfortunately it has become the "Sean / Shawn" of this generation - gender neutral and all too common. I feel a bit like Johnny Cash and the "Boy Named Sue" where I hope he doesn't hate me as he gets older. Honestly though, in our small town there's only one other Quinn (a little girl about his same age) and everybody in town knows him because of his unique name and even more special personality. So, guess it's alright in the end.
Quinn as boy's name is uncommon, but its popularity got a nice boost in 1985 and has been on a nice uptrend.
www.babycenter.com/baby-names-quinn-462915.htm
Quinn as girl's name is a different story.
www.babycenter.com/baby-names-quinn-6865.htm
It surged in popularity some time in 2009.
You're correct about the English name revival with Oliver going from 50th to 1st in the last decade.