My dd5 is Tahlia as the other spellings make the name sound different i pronounce mine Tah-lia. Thalia i would pronounce with the TH & Talia would be Ta-lia its funny cos when i dine a thread on this name every1 slated it lol
Well according to lots of baby names sites Thalia is of greek origin, means 'to blossom' and is the muse of comedy; whereas Talia is of Hebrew origin and means Dew of Heaven.
Talia is simpler to write and pronounce, but I like the meaning of Thalia more. And it will go better with dd's name, which is Sophia. Suppose she could be Tally or something for short. If dh doesn't reject it, that is.