Sforno on Genesis 9:19/ספורנו על בראשית ט׳:י״ט

1שלשה אלה בני נח, seeing that all of them were Noach’s sons, G’d blessed them all, even though one of them was wicked, when He said “be fruitful and multiply and fill the globe.” As a result of this blessing, באלה נפצה כל הארץ, the entire population of the earth traces its origin to one of these three sons of Noach.