What do you think of these names?

I wouldn't use Layla or Summer. I would use Thea or Tia. I would also juse all the boys names either as first or middle. Tia and Thea are different. Tia is Tee-Ah and the other is Th-eee-Ah. Not Fee TH. its a different sound, but people have problems with pronounciation so its going to end up sounding like Fee-AH.