Hamul: Son of Pharez
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Genesis 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: Hezron and Hamul.
Numbers 26:21
And these were the descendants of Perez: the Hezronite clan from Hezron and the Hamulite clan from Hamul.
1 Chronicles 2:5
The sons of Perez: Hezron and Hamul.