Search gender: all male female ユム Japanese Boy Names Variations. 1 names found. gender: all male female Name: yumu Katakana: ユム 3 Kanji: 由夢 Meaning: 由Source. Origin. to be based on. Reason. 夢Dream. Something you see as if it were real when you are asleep. Something you hope to achieve in the future. A pleasant thought that takes you away from reality. Something fleeting. Uncertainty. You can save your favorite names with NAZUKE PON > About Japanese Names > Search Japanese Names By Kanji > ユム Japanese Boy Names Variations.