Search gender: all male female Toyonaga Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: toyonaga Katakana: トヨナガ 0 Kanji: 豊長 Meaning: 豊Abundance. Large in quantity. Large. full. To make crops grow well. 長Long. Long distance or interval. A large range of time. Nurture. advantage. Relaxed. Eldest. Things that are at the top. Something that is useless. You can save your favorite names with NAZUKE PON > About Japanese Names > Search For Japanese Names > Toyonaga Name Meaning, Kanji Variations.