Search gender: all male female ダダヨシ Japanese Names Variations. 1 names found. gender: all male female Name: dadayoshi Katakana: ダダヨシ 0 Kanji: 忠良 Meaning: 忠Sincerity. To serve with sincerity. Seriousness. To serve the state or sovereign with all one's heart. To work hard without bothering. 良Good. Excellent. Favorable. Loving. Gentle. Somewhat. Fair. You can save your favorite names with NAZUKE PON > About Japanese Names > Search Japanese Names By Kanji > ダダヨシ Japanese Names Variations.