Save Gender Masculine Usage Japanese Scripts 鉄敦, 哲延, 徹展, etc.(Japanese Kanji) Pronounced Pron. TEH-TSOO-NO-BOO [key] Meaning & History From 鉄 (tetsu) meaning "iron" and 敦 (nobu) meaning "kindness, affinity, dui (vessel)" or 展 (nobu) meaning "to unfold, to expand". Other kanji combinations can be used.