On

Boyd’s Bible Dictionary:

Concise Bible Dictionary:

2. Son of Peleth, a Reubenite: he joined with Korah in murmuring against Moses and Aaron (Num. 16:11Now Korah, the son of Izhar, the son of Kohath, the son of Levi, and Dathan and Abiram, the sons of Eliab, and On, the son of Peleth, sons of Reuben, took men: (Numbers 16:1)). He is not mentioned after verse 1. The Jews say he separated from the guilty company and was saved.

Strong’s Dictionary of Hebrew Words:

Transliteration:
’Own
Phonic:
one
Meaning:
or (shortened); On {one}; of Egyptian derivation; On, a city of Egypt
KJV Usage:
On