御母
み
お
も
Meanings
1
mother (honorific); wet nurse (honorific)
honorific or respectful (sonkeigo)dated term
Dated honorific term for one's own or someone else's mother, or for a wet nurse. In modern Japanese, お母さん or 母上 are more common for 'mother', and 乳母 is used for 'wet nurse'.
In old documents, 'みおも' was used as a respectful term for one's mother.
In this tale, the wet nurse (みおも) takes care of the young princess.