I pronounce it differently every time, which probably doesn’t help. I pronounce it either [name_m]THAY[/name_m]-lee-a or TA-lee-a. With [name_u]Percy[/name_u] [name_m]Jackson[/name_m] books, I always thought it was [name_m]THAY[/name_m]-lee-a but then someone else told me it was TA-lee-a and now I pronounce it differently, although I always lean towards [name_m]THAY[/name_m]-lee-a.