How does Erin Hunter make up names for the cats in her books?

Erin Hunter is the pen name of a group of authors who have written the Warrior Cats series. There is no single Erin Hunter, so there is no single answer to this question. However, the authors have said that they often come up with names by combining two words or meanings. For example, the name Firestar is a combination of the words "fire" and "star." The name Graystripe is a combination of the words "gray" and "stripe."