Kash

Reminds me of Kash from Shameless. Not a great association.

Well..I guess this spelling might decrease the chance of unoriginal puns such as Kash Register. No offense, Salty Lemon, but that's not original. We all know where people put cash. Kash Wallet too, Kash Banks, Kash Money, Kash Chase. We get the idea. There are a lot of last names or words that sound undesirable with this first name. I'm hoping that you typed that just to be funny, not because you enjoy trolling others.
It's an okay name. It's kind of handsome.

Erm... I think you misspelled "cash".

Kash Register.

Laughable.