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

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

This disambiguation page lists articles associated with the title Cellarius.
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