Custos

n. pl. Custodes (kŭs*tō"dēz).
  1. A keeper; a custodian; a superintendent.
    2. Custos rotulorum (rŏt`&uuptack_;*lō"rŭm) (Eng. Law),
    the principal justice of the peace in a county, who is also keeper of the rolls and records of the sessions of the peace.