And thus do you find (the L–rd's esteem for the stranger-proselyte) in the four classes who respond before Him who spoke and brought the world into being, (Isaiah 44:5) "One shall say: 'I am the L–rd's'; another shall call in the name of Yaakov; another shall mark his arm 'of the L–rd'; and in the name of Israel he shall be called": "I am the L–rd's" — these are the fearers of Heaven, untainted by sin. "another shall call in the name of Yaakov" — these are the minors (who died in childhood), the sons of the wicked in Israel. "another shall mark his arm 'of the L–rd'" — these are the penitents. "and in the name of Israel he shall be called — these are the righteous strangers (i.e., the proselytes).
In the Name of Israel He Shall Be Called
Mekhilta Tractate Nezikin 18:9