Clement

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

the name means merciful Strong's Lexicon

Clement was a fellow laborer with Paul, whose name was in the Book of Life.

From Easton's Bible Dictionary

Mild,

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

First named at Philippians 4:3.

Philippians 4:3 Yes, and I ask you, my true yokefellow, to help these women who have contended at my side for the gospel, along with Clement and the rest of my fellow workers, whose names are in the Book of Life.