In the book of Acts (Acts, Book of), the John (Ἰοαννες/Ioannes) who was also called Mark (Μαρκος/Markos) is introduced as a traveling companion of Barnabas and Paul (Acts 12:12; 25–13:5). The name “John” (יוחנן/Yoḥanan) was a Hebrew name meaning “YHWH has been gracious,” whereas “Mark” (Marcus) was a Latin praenomen, of unknown origin (possibly originally associated wit…