In my mind I say no. Looks like Chair to me and I think people will pronounce it hat way.
I am asking because my cousin just named his 6th child this. I really dislike the spelling especially because his last name (mine too since I am hyphenated) begins with CHE. I envision everyone pronouncing them the same way. Chare- is Che...when it should be kare-is Che....
Re: is Charis a valid version of Caris or Carys?
It's a name on it's own, and it's supposed to be pronounced differently:
BFP #1 9/7/10, EDD 5/14/11, Violet born 5/27/11.
BFP #2 4/9/12, EDD 12/16/12, M/C Rory 4/24/12.
BFP #3 10/6/12, EDD 6/16/12., Matilda born 6/17/13.
Put me in mind of Charo, not Carys.
This. Not another form of Carys, just a similar name with a different origin. I can see how it is likely to be mispronounced with the last name, but it's a perfectly legitimate name on its own, and it has a nice meaning, too.