Cellarium, cellarij. Idem quod Cella. Plin. A cellar: a buttry: a store house.
Cellarius, cellarij. Plaut.A butler, or one hauing charge of a store house.
Lewis and Short: Latin dictionary
cellārĭum, ii, n. [cellarius] (post-class. access. form to cella), a receptacle for food, a pantry, Dig. 32, 41, 1; Cael. Aur. Acut. 1, 11, 93; 3, 21, 204.—II.Meton., food, provisions, Cod. Th. 1, 10, 3.
cellārĭus, a, um (access. form acc. plur. cellares, perh. for the purpose of avoiding the os four times repeated, Col. 8, 8, 1), adj. [cella], of or pertaining to a storeroom: sagina, Plaut. Mil. 3, 2, 31.—Hence, II.Subst.: cellārĭus, ii, m., one who keeps provisions, a steward, butler, Plaut. Capt. 4, 2, 115; Col. 11, 1, 19; 12, 3, 9; 12, 4, 2; Plin. 19, 12, 62, 188 al.