In discussing the genealogies of Christ found in the Gospels of Luke and Matthew (Matt. 1:1-16), notable discrepancies arise which have historically posed challenges for interpreters and have led to various interpretations. The main contrasts are as follows: 1) In Matthew’s genealogy, Joseph's father is Jacob (Matt. 1:16), while Luke lists Eli (Luke 3:23). 2) Salathiel and Zerubbabel have different fathers and descendants in both accounts. In Matthew, Salathiel is identified as the son of Jechoniah (Matt. 1:12), whereas Luke names him as the son of Neriah (Luke 3:27). Additionally, Matthew states that Zerubbabel's son is Abiud (Matt. 1:13), while Luke identifies him as Risaiah (Luke 3:27). 3) Regarding ancestry, Matthew's lineage traces Joseph’s descent from David through Solomon (Matt. 1:6-7), while Luke’s account goes through Nathan (Luke 3:31). 4) The lists of names from David to Salathiel (Matt. 1:7-12; Luke 3:31-27) and from Zerubbabel to Joseph (Matt. 1:13-16; Luke 3:27-23) differ, not only in names but also in their quantity.
Several explanations for these differences have been proposed: 1) One view is that Matthew documents Joseph’s lineage while Luke covers Mary’s, as both were descendants of David but through different branches. This interpretation is challenged by Luke’s explicit mention of tracing Joseph's genealogy (v. 23), and it was uncommon to maintain genealogical records for women, despite Mary’s Davidic lineage. 2) Another theory suggests that the individuals listed in both genealogies are identical, but with varying names due to the Jewish practice of assigning multiple names to the same person. This theory, however, contradicts the genealogies' indications of differing branches from David through Solomon and Nathan, as well as the discrepancy in the number of ancestors listed.
3) The most viable explanation for these differences may be rooted in the law of levirate marriage, which required a brother or close relative of a deceased man without children to marry his widow and continue the family line (see note on Matt. 1:12). The offspring from this union would have two fathers: one by natural descent and the other by legal obligation. Thus, Matthew calls Salathiel the son (in a legal sense) of Jechoniah, who was childless, while Luke refers to his biological father as Neriah, who continued the lineage of the childless Jechoniah.
Zerubbabel, who was adopted by Salathiel, fathered Abiud and Risaiah. Matthew follows the genealogy through Abiud, whereas Luke traces it through Risaiah, paralleling how Matthew connects his line from David via Solomon, while Luke follows the route through Nathan. Consequently, Matthew traces his lineage to Jacob, and Luke to Eli, both acknowledged as Joseph's fathers. Specifically, Eli, son of Matthat, died without children; thus, Jacob, his closest relative, married Eli's widow, resulting in the birth of Joseph. Therefore, Joseph is considered the son of Jacob by lineage and Eli by legal right. This genealogy can be succinctly summarized: David | Solomon---------- Nathan | | Jechoniah----- wife of both-----Neriah (childless) (continued the lineage) | Salathiel | Zerubbabel | Abiud -----------Risaiah | | Jacob---- wife of both------Eli (childless) (continued the lineage) | Joseph the betrothed.
The explanation for these genealogical differences is traced back to the 2nd-century writer Julius Africanus, who learned it from relatives of the Blessed Virgin (Euseb. Church Hist. 1, 7). This reasoning is widely accepted among many Church fathers and theologians. It is quite possible that the law of levirate marriage was applied on two occasions during challenging periods for the Davidic line, particularly during the Babylonian exile and prior to Christ’s coming, when the line of David was no longer ruling in Jerusalem.