Each part of the sword has a different name, based on the colours of the stones. Which part of the name relates to what part of the sword? Look at what parts swords with the same gem colours have in common!
Lorecorne, Cenatenne and Cenasumne all have a red gem on the grip, and the last two letters of each of the names are the same. Thus - the last two letters of the name depend on the colour of the hilt!
There are 4 areas of the sword that can be matched to letters, XX -XX-XXX-XX