Cellarius may refer to:
Surname
Cellarius is the Latin form of cellarer, an office within a medieval Benedictine abbey.
As a surname it is usually a Latinized form of the German name Keller. Notable people with the surname include:
Andreas Cellarius, 1596–1665, German-Dutch mathematician and cartographer Christoph Cellarius, 1638–1707, Christoph Keller, Weimar, classical scholar Ludwig Cellarius, died 1526, Ludwig Keller of Basel, first husband of Wibrandis Rosenblatt Martin Cellarius, 1499–1564, Martin Borrhaus, anti-Trinitarian reformer Henri Cellarius, 1805- 1875, Henri Chrétien Cellarius, a French dance professor and theorist.
Other 12618 Cellarius, a minor planet named after Andreas Cellarius Cellarius, a pseudonym used by Samuel Butler in his 1863 letter Darwin among the Machines