If you don't know the genders I'd use something neutral.
I named my Nanday Rowdy because I didn't know her gender, but she sure was rowdy. To this day though people always think she is a male because they consider it a more male name.
I knew my BC was female before I took her home from the breeder. I didn't have a name yet, but on the way home we were listening to the radio. She liked the song "Riannon" by Fleetwood Mac. Well, I figured no one would be able to spell that (and perhaps I didn't either!) so I named her Briana instead. She also answered to Bri or Bri Bri, but called herself Bri.
Names will come. Sometimes it takes time for the right one.