At dictionary.com, there is a bit of an inconsistency in the origins and meaning of two historical variants of the same (probably French) word:
noun, French Cookery.
1. soup, especially any thick soup made with cream.
C16: from Old French; see pottage.
... and Pottage
1. a thick soup made of vegetables, with or without meat.
1175-1225; Middle English potage < Old French: literally, something in or from a pot.
Do these words refer to different kinds of soup?
Why are there two spelling variants in English?