We theme ours ie-"The Mitchells", The Romans,your fav song or artists, washing powders etc anything and it's fun and makes it easier and you'll surprise yourself with how many names,themes you come up with-more tahn the amount of cats you have or get your family,kids etc to put suggestions in a hat-great way to get everyone involved
Think about your fav foods,films,colours of the rainbow..paint charts have great names for basic colors and remember it has to be one word and have only think it's up to 26 letters(could be wrong as it's my oh who deals with all that) in the name-have you sent off for your prefix then and what name did you finally settle on??