My niece has a best friend named Prairie and that was my first time hearing it (probably 3 years ago). I thought it was ridiculous at first, but it's been growing on me. I am from the Prairies, so it would be sentimental for me. I think I could easily be convinced to use it as a middle name, but as a first name it's just too whimsical for me. But if whimsical is for you, or if you are a poet-scholar, than by all means!
I can't quite get over how it sounds like a descriptor in combos though. Like, "Which
Agnes?" "Oh, Prairie
Agnes". :)
Three boys nappin', one mama namenerdin'
To peruse my top 100ish names:
http://www.behindthename.com/pnl/82589
He is becoming greater, I am becoming less
Bits of the journey here:
http://jodifriesen.blogspot.ca/And some family cuteness here:
https://www.flickr.com/photos/41705228@N08/