Help with changing random names for a culture in files

Hi everyone, hoping someone has experience particularly with doing this for the AGOT mod.

I've been looking to change the available random names that both the AI uses and the in-game 'random' option when naming children for the High Valyrian culture, and if necessary, Targaryen dynasty. 

I've modified and removed a shite ton of names from the fk_valyrian file in common/cultures and selected used_for_random = yes, however, the same names that I removed from that file continue to appear from AI and my random option. Just to be sure it wasn't something I wasn't understanding I also removed & added the same names to the dynasty_cultures file in common/cultures.

e.g. High Valyrian cultures naming their son Aelyx. I have removed Aelyx from every mention of association in the files apart from westerosi_valyrian and other non-High Valyrian cultures.

Appreciate your help.