Reference: UsedNames.txt

Purpose

Contains all of the character names that are in use. Also serves as a two-way association between a character name and CreatureDef ID. Global lookups for names or IDs will often use this data.

Data Format

List file. One entry per line. Delimiter: equals sign (=)
Comment character: semicolon (;)
No header.

Each line is key=value pair in the following format:
CreatureDefID=Character Name