"Apostle" is a word in ENGLISH

The missionary who first plants the Christian faith in any
part of the world; also, one who initiates any great moral reform, or
first advocates any important belief; one who has extraordinary success
as a missionary or reformer; as, Dionysius of Corinth is called the
apostle of France, John Eliot the apostle to the Indians, Theobald
Mathew the apostle of temperance.

Literally: One sent forth; a messenger. Specifically: One
of the twelve disciples of Christ, specially chosen as his companions
and witnesses, and sent forth to preach the gospel.

A brief letter dimissory sent by a court appealed from to
the superior court, stating the case, etc.; a paper sent up on appeals
in the admiralty courts.