doyenne
'decaNo' means 'senior, dean, oldest member of a profession'
Datin is the answer
A bencher is a senior member of a law society in a Canadian Province, except New Brunswick.
A name for a senior female could be "Elderly woman" or "Senior lady".
The Senior Skull Honor Society was created in 1906.
doyen
prior
The senior member of the White House is the White House Chief of Staff
Prior
elder
A senior member of government
Senior Female Elephant?