I love the name grantaire

For those who don't know, Grantaire is the name of a character from Les Mis and I absolutely love it but the thing is.. it's not a real name, like it wasn't a french name of the time, it certainly isn't a french name now It is a sort of joke name because victor Hugo just made it up Buttttt Like who would know and also do you think it matters? Probably not but I would love to know your opinions and if you have any names you love that aren't necessarily 'real' names!! I love this kind of stuff :)))