Origin: Germanic Old English suffix
Baroness has 2 different meanings across 1 category:
a noblewoman who holds the rank of baron or who is the wife or widow of a baron
"The new countess was surprised to find that her husband's title had been inherited by his daughter, making her the only daughter-in-law to become a baroness in their family history."
The wife of a baron.
"After the royal investiture ceremony, the newly appointed baroness waved to her cheering husband from the balcony."
The word baroness comes from Middle English, where it was formed by adding the female suffix -ess to the word baron. It originally referred to the wife or daughter of a baron.