Search gender: all male female Sonshin Boy Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: sonshin Katakana: ソンシン 0 Kanji: 孫伸 Meaning: 孫Grandchild 伸Stretch. To extend. To extend and spread. To extend one's influence. To relax. To release tension. To state. to declare. You can save your favorite names with NAZUKE PON > About Japanese Names > Search For Japanese Names > Sonshin Boy Name Meaning, Kanji Variations.