none in particullar just any vocaloids you know, because i don't want to say their names wrong
Paste their Japanese names into Google Translate and hit the read out button.
Works well enough. Not sure if it'll 100% get the reading right though.
Only the Chinese and Korean ones should bring you trouble, everything else is Japanese or English, and the Japanese ones are usually pretty simple, like Miku(Meekoo), Rin(Reen), Len(Lehn) MAYU(Mahyoo) etc. (I hope this didn't sound stupid......)