I guess this is the answer.
By default, the name files are used only upon the creation of a new saved game. At that time, all the names in the name files are converted into a file called "names.dat" that is stored in the saved game directory. OOTP uses names.dat to generate names any time new players or personnel are created. However, if you wish to change the names database for an existing saved game, you can modify the names files, and then re-import them into your saved game using the
Re-Import Name and Ethnicity Database option on the
Global Setup page.