Noun
Lady Mayoress (plural Lady Mayoresses or Ladies Mayoress or Ladies Mayoresses)
The wife or other official female consort of a Lord Mayor
A female Lord Mayor or an unmarried male Lord Mayor may appoint a female consort, usually a fellow member of the corporation, to the role of Lady Mayoress. Source: Internet
In speech, a Lord Mayor is referred to as "My Lord Mayor", and a Lady Mayoress as "My Lady Mayoress". Source: Internet
Often flanked by his wife, Lady Mayoress Georgina, and daughters Michelle and Deborah, the last 12 months have been a challenge for the outgoing Lord Mayor, but one he thoroughly enjoyed. Source: Internet