Thanks for all your help.
Terra (or Tara), Tanya, Thomas, Theo, Tristan... My advice is don't go too close in the names, because it gets confusing if you're calling to one of them. My sister and I don't even have that close of names, but they have the same cadence, so even then it sometimes gets confusing. Good luck.
Tyson
Trigg
Trinity
Teigann