Iechonias is the personal name carried through the genealogy as Josiah’s descendant and Shealtiel’s father.

The attested use is a personal name within a genealogy: Matthew 1:11 places the accusative form in Josiah’s line, and Matthew 1:12 uses the nominative form as the father of Shealtiel.

1. Personal name in a genealogical succession · dominant

   In Matthew 1:11, the accusative singular masculine form occurs in the clause in which Josiah begets this person; the APB renders the verse "Josiah then begot Jechoniah and his brothers upon the deportation of Babylon." In Matthew 1:12, the nominative singular masculine form stands as the subject of begetting Shealtiel; the APB renders, "After the deportation of Babylon, Jechoniah begot Shealtiel."

   Matthew 1:11Matthew 1:12

In the Anselm Project Bible: The APB presents the name as "Jechoniah" in both verses, first as the person begotten by Josiah and then as the one who begot Shealtiel. These renderings confirm the verse-level genealogy rather than isolate each form independently.