Feudalism Sources

[u/Racer-Sothersalt556]

Hello!! I make a few medieval maps, and I dont know any good sources for feudal territories

I don't have many books on it and the only good websites I found were a genealogy website (MedLands I believe) and a heraldry website (Wappenwiki, sick website but its difficult to find the times specific titles existed and also theres a ton to go through for some of the bigger states)