When he was a child (until about age fourteen), he was called Bennosuke (written as '辨助' or '弁助' or '弁之助', pronunciation is the same), and later he also called himself Niten or Niten Doraku.
幼名は辨助（べんのすけ、弁助、弁之助とも）、号は二天、また二天道楽。