Custos is the Latin word for guard.
Titles Custos rotulorum ("keeper of the rolls"), a civic post in parts of the United Kingdom and in Jamaica Custos (Franciscans), a religious superior or official in the Franciscan Order Custos (under-sacristan), a Roman Catholic office
Music Custos, the Latin word for a Direct (music symbol)
Other AB Custos, a Swedish investment company Custos, a fictional secret organization in the Japanese film series Towa no Quon Custos Messium, an obsolete constellation A modern name for the star BE Camelopardalis
Proverbs The nominative and accusative plural form custodes is used in the proverbial phrase Quis custodiet ipsos custodes?, "Who has custody of the custodians?".