In "Ogura-shi Saichi Origami Shahei Zakki" (memorandum record on the territorial certificates of the Ogura clan) (historical document owned by The University of Tokyo), it is written 'Nobuyoshi, the name in his infancy, Shaku Chomaru (長丸), Oda Musashi no Kami (Governor of Musashi Province Oda), a pseudonym after tonsure, Doboku,' and therefore, it is possible that his childhood name was Chomaru (長丸).
小倉氏采地折紙寫并雑記（東京大学所蔵史料）によると「信吉少名酌長丸織田武蔵守剃髪後号道ト」とされ、幼名は長丸であった可能性もある。