Search gender: all male female レイニ Japanese Boy Names Variations. 1 names found. gender: all male female Name: reini Katakana: レイニ 0 Kanji: 励仁 Meaning: 励Work hard 仁Compassion. Kindness. People. A word used with respect to a person. The heart of a person. Humanity. A person who has virtue. You can save your favorite names with NAZUKE PON > About Japanese Names > Search Japanese Names By Kanji > レイニ Japanese Boy Names Variations.