Beth-ee-uh and beth-IE-uh are both pretty pronunciations but I wouldn't use it. I suppose Bethia is the better spelling if I had to choose - especially if its for a girl. I would not name a boy Bethiah because it contains "
Beth", but I do think it sounds unisex.
https://youtube.com/@MarioDrama632 or
https://youtube.com/@Objects_2763 :3