Names similar to Grayson?

I am in love with the name Grayson, but my partner and I agreed we won't use it because his name is Jackson and our last name is Nelson. I am looking for names that sound similar to Grayson, and so far have cone across Graylen/Graylin and Grayden. Any other ideas? I don't want to go with just Gray/Grey. Middle name will be Walter, last name Nelson šŸ’™šŸ‘£