there is no doubt that i wa ta is pronounced as I wa ta, but in Xinye, there are still different pronunciations (ni i no, shin no, a ra no) according to specific people, and this is also a common phenomenon in Japanese names, that is, you may not know its pronunciation even if you know its writing, so it is possible to pronounce both upstairs.
I hope I can help you ~ ~
Refer to Wikipedia:
Japanese name にぉけるのつ. Call me by my name, world, people, and people. Example) しんのぁらのなど