I retired from breeding a few years ago, but when I chose a cattery prefix, I did it by picking a name symbolic to me at that time.
So..you can do that, you can consider how you will name your kittens (some folks plan to use flower/herbal names, or artists names or...you get the picture) and choose a prefix that will go nicely with your planned naming theme.
One of my favorite cattery names (and it was for a persian cattery) was "Theadorable"
Within the breed I worked with, American Curls, one of my favorite cattery names was that of the founder's of the breed, "Curlniques".
Another thing to keep in mind would be that choosing a lengthy prefix will affect just what kinds of names you can then choose for your kittens, you may wish to choose a short one (mine was only 5 letters long)