Saussier.

Two etymologies are known, which have gradually become the same surname: first, a toponymic surname referring to a willow grove, from Middle French, Old French saule (“willow”), ultimately from Gaulish salico, Proto-Celtic *salik, Proto-Indo-European *salǝḱ-, *salǝk-; second, an occupational surname, from Late Latin salsārium, from Medieval Latin salsārius (“of or for salted things”), from Latin salsus (“salted, briny”), sāl (“salt”). The Middle French, Old French term saussier, attested from 1285, referenced to a cook or chef whose specialty was the preparation of sauces; the surname is also connected to the noun sauce. Both forms are primarily found in the Doubs region, in Bourgogne-Franche-Comté.