Judah marries and has children
Judah married Bath-shua and had three sons: Er, Onan and Shelah.
Key passages
Ge 38:1–5

And it happened that at that time Judah went down from his brothers and pitched his tent near a certain Adullamite, whose name was Hirah. And Judah saw the daughter of a certain Canaanite there whose name was Shua. And he took her and went in to her. And she conceived and bore …

See also
Ge 46:12; Nu 26:19; 1 Ch 2:3;