Who was Jesus's paternal grandfather?

What follows is one scholar’s way of reading this disagreement — a critical-historical view that often concludes the texts genuinely disagree. It draws on the peer-reviewed sources listed below and stands as one position among the answers above, presented for transparency, not as GEBible’s position.

How critical scholarship weighs this: Widely regarded as a genuine contradiction

This summarizes where critical scholarship tends to land on this tension — a report on the field’s center of gravity, not GEBible’s own ruling.

Narrowed to a single generation, the problem is stark: Matthew and Luke disagree on the name of Jesus's paternal grandfather. Matthew 1:16 reads *Iakōb de egennēsen ton Iōsēph ton andra Marias* — "Jacob begot Joseph the husband of Mary." Luke 3:23 reads *ōn huios, hōs enomizeto, Iōsēph tou Hēli* — "being the son, as was supposed, of Joseph, of Heli." One Evangelist makes Joseph's father Jacob; the other makes him Heli. There is no textual variant of weight that softens this; the manuscript tradition is stable for both names (the few minuscule eccentricities in Luke's list, and the wholesale substitution of Matthew's genealogy into Luke in Codex Bezae, are secondary harmonizing moves, not earlier readings). The contradiction is therefore not a copying accident but a feature of the two source genealogies as the Evangelists received and edited them.

Two harmonizations have dominated since antiquity, and each deserves its strongest form. The first, transmitted by Julius Africanus (in his *Letter to Aristides*, preserved in Eusebius, *Ecclesiastical History* 1.7), invokes levirate marriage (Deut 25:5-10): Heli died childless, his uterine brother Jacob took the widow, and the resulting son Joseph was Jacob's biological child but Heli's legal heir. Africanus claimed this on the authority of the *desposynoi*, Jesus's surviving relatives, which gives the tradition a respectable pedigree. Against it: the scheme requires Jacob and Heli to share a mother but different fathers (since Matthew's and Luke's lines diverge far above this point), an elaborate stipulation with no independent attestation; and crucially, fixing only the final generation does nothing to explain why the entire lists above Joseph differ — Matthew runs through Solomon and the royal Judahite kings, Luke through Nathan and a parallel non-royal line. The levirate device patches one rung of a ladder that diverges along its whole length.

The second harmonization, that Luke gives Mary's line and *tou Hēli* means "son-in-law of Heli," became popular in Protestant exegesis through Luther and especially Annius of Viterbo, and was systematized by John Lightfoot and later by Geisler. Its appeal is that it makes both genealogies literally true of distinct people. But the Greek resists it. *Tou Hēli* is the identical articular genitive construction Luke uses for all seventy-six links in the chain (*tou Maththat, tou Leui*, and so on); to read this one slot as "son-in-law" while reading every other as "son" is special pleading unsupported by any parallel in Greek genealogical writing, where a man is never silently entered under his wife's father's name. Luke 3:23 also frames the whole list as Joseph's ("as was supposed, of Joseph"), not Mary's; she is not named.

The parsimonious critical reading is that Matthew and Luke drew on independent traditional materials, both purporting to supply Joseph's ancestry, and neither redactor attempted reconciliation. This fits a larger pattern: the two infancy narratives agree on remarkably little — Matthew has magi, a star, Herod's massacre, and a flight to Egypt; Luke has shepherds, a Roman census, and a peaceful return to Nazareth. Brown's *Birth of the Messiah* treats the genealogies as theological constructions serving each Evangelist's distinct portrait (Matthew's royal-Davidic, Luke's universal-Adamic) rather than as competing transcriptions of a single archive. Davies and Allison and Fitzmyer concur that the divergence is irreducible on historical-critical grounds. Bauckham's careful study of the *desposynoi* lends the Africanus tradition more credit than usual but still cannot close the gap above Joseph.

Where the critical reading lands: genuine contradiction. Matthew names Jacob, Luke names Heli, and the harmonizations require either an unattested levirate arrangement that fixes only one rung or a grammatically forced "son-in-law" the Greek will not bear.