These were the names of the sons of Levi according to their records: Gershon, Kohath, and Merari. Levi lived 137 years.
Jewish Publication Society of America Version (JPS1917) - Exodus 6:16 >And these are the names of the sons of Levi according to their generations: Gershon and Kohath, and Merari. And the years of the life of Levi were a hundred thirty and seven years.