ISB ~ John 1 v12

believed in his name:i.e., believed that Jesus is the Messiah of Israel and the eternal Son of God (20:31; 1 Jn 5:1, 13). Names are inseparable from persons in Semitic thinking. So, for instance, the Lord himself is invoked when his name is called upon in worship (Gen 4:26; 12:8) and when covenants are ratified by swearing an oath in his name (Gen 21:23; 24:3).

children of God:By the grace of divine generation we are filled with divine life and reborn as sons and daughters of the Father (1 Jn 3:1, 9). This transformation requires faith and takes place in Baptism (3:5-8; Gal 3:26-27) (CCC 2780-82).