Save Gender Masculine Usage Japanese Scripts 信夫, 信男, etc.(Japanese Kanji) Pronounced Pron. NO-BOO-O [key] Meaning & History From 信 (nobu) meaning "trust" or 延 (nobu) meaning "prolong, stretch", combined with 男 (o) meaning "male", 夫 (o) meaning "man, husband", or 雄 (o) meaning "hero, manly". Other kanji combinations are possible.