According to People magazine, the couple really likes "unisex names" and that's why they settled on a traditional boys' name for their daughter.
I checked the Social Security database, and Wyatt was given to boys 99.8 percent of the time in 2013.
A good rule of thumb is if a name was given to less than 90 percent of one gender, then it's unisex. (Elliot qualifies, incidentally. It's 83 percent male.) Nameberry had a handy post on this topic last year.
You could argue that certain names have a historical unisex status. Take Lindsey/Lindsay, which used to be a boys' name. It is now 99 percent female, but I still think it counts as unisex.
Wyatt isn't historically a unisex name and it isn't one now.
So here's my message to celebrity parents: Feel free to name your kids whatever, but don't corrupt the language in the process.