Alright, alright. In one of the earliest encyclopedias in the Middle Ages in the Middle High German language area, the Summarium Heinrici, there are a few translations of words in Latin. And one of these words was "Lucius", which is a kind of fish. Unfortunately I can't remember what kind of fish. But "Serra" was a fish as well. So, sausage people for Magvel and fish people for Elibe.