Almost there, but if you didn't know how the name was supposed to be pronounced,you (one, that's to say, not you, Shannon!)might be inclined to say it with a hard "G", like
George.
Leave out the y, and
Ghislaine still might be said with a hard G, so I think, just teach people how to say it.
Ghislaine is a beautiful name. I know a few people so named. One of them, though, married an English speaker, and he always called her
Jessie.
This woman is one of three sisters, one of the others is named Valderas, seemed they had a liking for non-popular names.
The third one, I don't know her real name, she has one of those family nick-names that come nowhere near the actual name.