sillysheila's list "Vintage Greats for Girls" of 3 great name ideas: Thelma - Laverne!

Vintage Greats for Girls

Though modern parents seeking to honor an ancestor named Thelma might opt for the airier Thea instead, Thelma is starting to make its way back onto adventurous vintage name lovers' radars. It is currently experiencing a revival in France, where ranked at the #250 mark in a recent year.
 The meaning of Thelma is unknown, although it is sometimes claimed to be derived from the Greek thelema "will". Alternative possibilities are that it's spin on Velma or Wilhelmina, meaning "resolute protection", a feminization of the saintly, Germanic Anthelm, meaning "zealous protection", or perhaps a spin on Ethelmary, meaning "noble and beloved" or "noble drop of the sea">.
 
It was extremely rare as a given name until British writer Marie Corelli used it for the Norwegian heroine of her eponymous novel in 1893. It went on to become a popular choice in the early 19th-century before falling out of style in the 80s. 
 In the English-speaking world, Thelma is associated with Geena Davis' character in the iconic female-centred crime movie Thelma and Louise (1991). It was also the birth name of first lady Pat Nixon.

Thelma

Could cute nickname Gertie, remembered as cute five-year-old Drew Barrymore in E.T., revive the long shunned Gertrude?
 It's tempting to dismiss Gertrude as a name on its way through the door marked Out Forever, except that its long and honorable pedigree--as a goddess in Norse mythology, as the gentle and mystical Saint Gertrude the Great, and another St. Gertrude who is the patron of cats, and its use by Shakespeare for Hamlet's (not exactly exemplary) mother--earns it a place on the permanent roster. It has also been borne by such varied figures as writer Gertrude Stein, swimming champ Gertrude Ederle, British stage star Gertrude Lawrence, and arts patron Gertrude Vanderbilt Whitney.
 The pinnacle of fashion a century ago, Gertrude reached as high as Number 23 in 1900, but dropped off the list completely in 1966.

Gertrude

Although it has a sweet meaning, this name feels dated nowadays, like a fifties poodle skirt. Lavender may be a fresher alternative.