sub-prefect
/ˈsʌbˌpriːfɛkt/(also sub-praefect)
noun
An assistant or deputy prefect.
Origin
Mid 17th century; earliest use found in Marchamont Nedham (bap. 1620, d. 1678), journalist and pamphleteer. From sub- + prefect, originally after classical Latin subpraefectus deputy prefect, assistant, auxiliary.