I don't like either, just the th I suppose, I do like
Talia though, with siblings if 2 had T I'd continue with all T, unless multiples were next and I'd change the letter.
Tristan is nice,
Todd Tessa Trina Tobias Tabitha Talitha Timothy Thomas Tamar Tamara Tamsin Tasmin Tasma
Tara Taryn Tegan