Because the word 'tsubone' means 'a space where a wife and her children live,' it can be assumed that the lawful life was called 'Mitsubone' reflecting her status as the most authoritative person in the inner hall of a castle, and that the 'Mitsubone' who was given more chigyo fief than anyone else among those listed in "ODA Nobukatsu Bungencho" was Nohime.
「局」が「妻子の居住する空間」を示すことから、奥でもっとも権威のあった正室を「御局」と称したとも考えられ、『織田信雄分限帳』に記載されているもっとも知行の多い「御局」が濃姫という可能性もある。