Onan

A man, in the time of Egypt and Wilderness · Tribe of Judah · named in 6 verses

the name means strong Strong's Lexicon

Onan was the second son of Judah, who was punished by God for his wicked actions.

From Easton's Bible Dictionary

Strong, the second son of Judah (Gen. 38:4-10; comp. Deut. 25:5; Matt. 22:24). He died before the going down of Jacob and his family into Egypt.

Easton's Illustrated Bible Dictionary, 1897 — public domain, quoted in full and unedited.

From STEPBible's TIPNR genealogy data. A relationship the data marks uncertain is not shown here.

First named at Genesis 38:4.

Genesis 38:4 Again she conceived and gave birth to a son, and she named him Onan.
Genesis 38:8 Then Judah said to Onan, “Sleep with your brother’s wife. Perform your duty as her brother-in-law and raise up offspring for your brother.”
Genesis 38:9 But Onan knew that the offspring would not belong to him; so whenever he would sleep with his brother’s wife, he would spill his seed on the ground so that he would not produce offspring for his brother.
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 26:19 The sons of Judah were Er and Onan, but they died in the land of Canaan.
1 Chronicles 2:3 The sons of Judah: Er, Onan, and Shelah. These three were born to him by Bath-shua the Canaanite. Er, Judah’s firstborn, was wicked in the sight of the LORD. So the LORD put him to death.