Search gender: all male female ニンニ Japanese Girl Names Variations. 1 names found. gender: all male female Name: ninni Katakana: ニンニ 1 Kanji: 任仁 Meaning: 任To leave to others. A role or matter to be fulfilled. Guarantee. To assign to an official position. To give a role to. To let do as one pleases. 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 > ニンニ Japanese Girl Names Variations.