If you're unsure about whether they are girls, if you manage to get a pic of their bottoms we could help you make sure.
As for names, caro has some good suggestions! Smokey and Pepper are cute.
I like putting people names to them personally. I have Marley, Todd, Finley and Saffy for mine, and Pipkin - not a person name, but she's tiny and adorable so it fitted.
The pic is taking forever to load because of my slow connection, but I can give you some names without looking.
How about... Molly, Ellie, Ella, Cherry, Penny, Sasha, Faye, Bealey, Bumble, Skipper, Tiger Lily, Peaches, Mischa, Delilah?