The most popular name for boy dogs is Max, and the most popular name for girl dogs is Maggie. So if you want every dog at the dog park to prick up their ears when you call your dog, you can use one of these names!
This very important information about dog names comes from this website: http://www.bowwow.com.au/find-a-name-for-your-pet/top-20-names.aspx
You can go there and look at the top 60 names for dogs and cats. But here are lists of the top 20 for girl dogs and for boy dogs. If you want to see more, then you'll have to go to the website.
The top 20 names for girl dogs:
From these lists we can see that (1) there are several names that can be used for either a boy or a girl dog and (2) some people don't use much imagination when they are naming their dogs. Personally, I am happy to have a name like Piper that is not only cute, but that is not as common as dirt. Frankly, I don't want to share my name with every Maggie, Bear, and Molly that comes along. Maybe this is selfish of me, that that's how I feel!