Matthew Henry Presbyterian @wholebiblehenry

All nations but the seed of Abraham are already shaken off from this genealogy: they have no part nor lot in this matter. The Lord's portion is his people. Of them he keeps an account, knows them by name; but those who are strangers to him he beholds afar off.

Commenting on 1 Chronicles 1:28-54

Keil & Delitzsch Lutheran @keilanddelitzsch

1Ch 1:34 The two sons of Isaac. Isaac has been already mentioned as a son of Abram, along with Ishmael, in 1Ch 1:28. But here the continuation of the genealogy of Abraham is prefaced by the remark that Abraham begat Isaac, just as in Gen 25:19, where the begetting of Isaac the son of Abraham is introduced with the same remark.