Quartus

A man, in the time of the New Testament · named in 1 verse

the name means of Latin origin (fourth) Strong's Lexicon

Quartus, a Christian brother in Corinth, sent greetings to the believers in Rome through Paul's letter.

From Easton's Bible Dictionary

Fourth, a Corinthian Christian who sent by Paul his salutations to friends at Rome (Rom. 16:23).

Easton's Illustrated Bible Dictionary, 1897 — public domain, quoted in full and unedited.

First named at Romans 16:23.

Romans 16:23 Gaius, who has hosted me and all the church, sends you greetings. Erastus, the city treasurer, sends you greetings, as does our brother Quartus.