Ioustos is used as a personal name or surname identifying men in the cited passages.

The attested uses present Ioustos as an identifying personal name or surname: it names Titius Justus, marks Joseph as surnamed Justus, and identifies Jesus as called Justus.

1. Personal name or surname identifying a man · dominant

   In Acts 18:7, the genitive singular masculine form occurs in the phrase about the house of Titius Justus; the APB renders the man as “named Titius Justus.” In Acts 1:23 and Colossians 4:11, the nominative singular masculine form identifies Joseph as “surnamed Justus” and Jesus as “called Justus” in the APB.

   Acts 18:7Acts 1:23Colossians 4:11

In the Anselm Project Bible: The APB presents the term within personal identifications: “Titius Justus,” “surnamed Justus,” and “called Justus.” These phrases show the verse-level presentation rather than a separate English definition.