Shimon or Simeon ben Hillel was the son of Hillel the Elder.
When Hillel died, Shimon may have taken over his place as the Nasi of the Sanhedrin, as is implied by a passage in the Talmud.
[1] Simeon was the father of Gamaliel I, and grandfather of Simeon ben Gamaliel,[2] who may have been his namesake.
Some Christian writers identify him with the Simeon who blessed the infant Jesus.
[3] This biographical article about a rabbi from the Middle East is a stub.