What does Talia mean?
Hebrew tal 'dew' + Yah (God), traditionally 'dew of God / dew from God' — an interpretive reading rather than a biblical name. Note two separate threads that are not part of the Hebrew sense: the Aramaic word talya ('young lamb, youth'), and the Greek Thalia ('blooming, flourishing'), with which the spelling overlaps.
What does Seraphina mean?
Feminine form derived from the seraphim, the highest order of angels, whose name comes from the Hebrew root 'saraph' meaning 'to burn'. The seraphim are traditionally described as the burning or fiery ones.