What do you base the geats names on? I personally had big a issue when making such a list, since the name is very similar to the list of Swedish ones(half the Kings of Sweden in the vanilla game peiod were geats). I can send my own culture list over, but I doubt its much use for Lux Invictus, and since Beowulf and his ilk fits your time period better you are probably not in short of names
Alternate history is easier to do names for.

If all goes wrong you can even be creative and extrapolate a bit.
I used the Swedish name list as base then I purged it of some names that did not fit, and then I added names of legendary kings of the Geats to the list - there's quite a few between the Gesta Danorum and the Sagas if you want legendary kings.
As usual mediafire takes forever to upload...when it's done I'll post that the update is up and go ZzzzZzzz.
I have added some new localisation to this update, some provinces and cultures were localized etc.
As a warning to the British lovers - the duchies setup there is foxed imho, I will have to redo it completely when I switch to a new map. The dejure borders of the kingdoms implemented are foxed because of it too... for now it works, in the future it will have to be addressed.
REMEMBER THAT YOU MIGHT HAVE TO DELETE YOUR GFX FOLDER IN DOCUMENTS NOT IN YOUR INSTALL in order to have flags display properly. (as explained in first post, caps so people notice this)
UPDATE 04D POSTED!
The Dragon Banners answer the call of the True King! Forth, Horse Lords of the West!
Oh I forgot...before I go to bed I need to tell you this: you might be better off waiting a bit before Raising the Dragon Banners... the British setup is not finished yet, and I will be adding blood traits there soon.
ALSO I COPY PASTE THIS AGAIN:
REMEMBER THAT YOU MIGHT HAVE TO DELETE YOUR GFX FOLDER IN DOCUMENTS NOT IN YOUR INSTALL in order to have flags display properly. (as explained in first post, caps so people notice this)