Kingdom of Thessalonica
Berthold II von Katzenelnbogen () was a German nobleman of the family of the Counts of Katzenelnbogen and a participant in the Fourth Crusade (1202–04), who became lord of Velestino (1205–17) and regent of the Kingdom of Thessalonica (1217) in Frankish Greece. He was a patron of poets and in politics a Ghibelline.