Anonymous wrote: English speakers, and particularly Americans, are the only ones who will have this problem.
It doesnt seem so different to me than all the Anna’s and Andreas who also have to specifiy which A sound to use. So long as she (and you) won’t be super offended when people get it wrong.
I'm going out on a limb here and predicting that most people saying the kid's name will be American.
Also still confused about Hastle. Is it the last name? If so, people will assume that since the first syllable of each name looks the same, it sounds the same. If it's a misspelling of the word "hassle," OP needs to stick with names that have conventional spellings (and pronunciations).