The prefix of a name is the most important part of a Clan cat's name, as it is the part that they will keep throughout their life (unless in the rare occurrence it changes). This name is usually given to a cat at birth by their parents. It will often may have some sort of meaning, whether that be being named after something important or just after the cats pelt color. Or in some cases may just be whatever name the parents choose with no special meaning at all. Thunder, River, Wind, Shadow and Sky have been used on certain occasions, however they are supposed to be unique to the original Clan Leaders who used them as their names before the addition of the 'star' suffix was later added to Clan Leader's names. Once an Apprentice becomes a Warrior or a full Medicine Cat, they are given their new Warrior or Medicine Cat name. Unlike the other ranks in the Clan, these names do not have a generic suffix, but rather get a new suffix chosen by either the Clan Leader if a Warrior, or their mentor if a Medicine Cat. Similar to the prefixes, the suffix may have some meaning to it, such as if a cat has shown bravery, a common example would be to give them the suffix 'heart'. However in most cases the chosen suffix will be somewhat random and chosen to match the prefix they were given at birth. I hope this helps you, enjoy.