From A Wiki of Ice and Fire
A Mother is the senior member at motherhouses of the Faith of the Seven.
Mother Maris taught generations of orphaned girls at a motherhouse in Gulltown that was later renamed in her honor.
During the reign of King Jaehaerys I Targaryen, Queen Elinor Costayne gave up all claims to nobility, join the Faith, and eventually became Mother Elinor at the great motherhouse in Lannisport.
- ↑ 1.0 1.1 Fire & Blood, A Time of Testing - The Realm Remade.
- ↑ Fire & Blood, The Lysene Spring and the End of Regency.