I doubt this...The Noblesse has the power that stands above all others so...i am sure that the power of Raizel was equal to that of the previous Lord also because he respected too Raizel...there must be a reason because he was adamant about wanting to leave Ragnarok to Raizel...maybe her daughter was too weak and emotional to handle that weapon...probably the previous Lord will explain everything in the message he left in his shrine...
The previous Lord, left his Ragnorak to Raizel. Then vested his soul in the blade he gave to his daughter.
Had he given her the true, and first Ragorak he had inherited she would be too powerful for Raizel.
This is my guess. Because Raizel seems to have recognized the blade name or at least the soul in it.