<a href="https://nameberry.com/unique-names">Unique names</a> don't have to be new and invented: They can also be vintage names revived from either the near or distant past. 

Unique vintage girl names on their way back into style include Sybil, Isadora, Cordelia, and Olympia. Names such as Lois, Polly, Constance, and Wilhelmina are attracting attention among the hipsters and the tastemakers, but still have a generation or two to go before they will be seen as fashionable among the mainstream.
 
These unique <a href="https://nameberry.com/list/339/Vintage-Baby-Names">vintage baby names</a> for girls have deep roots and rich histories, but were given to 250 or fewer girls in the US last year. 
<h2>Unique Vintage Girl Names</h2>

Unique Vintage Girl Names

The super-success of Adele, both the singer and the name, has brought attention to all her cousins — Adela, Adeline, Adelina — and the lovely Adelia. An undiscovered gem just waiting to be discovered.
 
Some pluses: Adelia is the name of a flowering plant, and of an opera by Donizetti that premiered in 1841.

Adelia

A light, bohemian-sounding biblical name, mentioned in the bible as a wife of Lamech, one of the first men.

Zillah

A vibrant variation of Adele, with a bit of extra flair from that "-a" ending. It could join the army of popular A girls' names, especially with its tie to the success of singer Adele. 
 Adela, which came to England with the Normans in the eleventh century, has a royal pedigree via William the Conqueror's youngest daughter.
 Adela Quested is a character in E. M. Foster's novel A Passage to India, and the name also appears in an Agatha Christie story. Journalist/novelist/screenwriter Adela Rogers St. .Johns was a colorful character in Golden Age Hollywood.
Adelia is another appealing variation, an alternative to the rising Amelia, and entered the UK Top 1000 in 2022.

Adela

Unique Vintage Girl Names, including female names from different eras in history, old lady names, old fashioned names for baby girls, with meanings, origins, and popularity (Page 10)