Mulciber

Mulciber may refer to:
 * An alternate name for the Roman god Vulcan
 * A fallen angel in John Milton's Paradise Lost
 * Mulciber, two Harry Potter characters
 * Mulciber (beetle), a genus of longhorn beetles
 * Mulciber (volcano), an extinct volcano in the Dutch part of the North Sea
 * Alucita mulciber, a species of moth
 * Euploea mulciber, a species of butterfly