Genesis 38:30

38:30 Afterward his brother came out – the one who had the scarlet thread on his hand – and he was named Zerah.

Genesis 46:12

46:12 The sons of Judah:

Er, Onan, Shelah, Perez, and Zerah

(but Er and Onan died in the land of Canaan).

The sons of Perez were Hezron and Hamul.