Isabella, Ava, Olivia, Emily/Emma, Sophia, and Charlotte are anything but old lady names. They've been the go-to wannabee Euro-aristo set names for 20 years.
They replaced with faux Greenwich/Buckingamshire "classic" the frilly Melissas Marissas Jennifers Tiffanys. Caitlyn in all the absurd spellings dreamt of, seems to have survived that era.
Its really a Jane Austen craze, not an old lady craze. Interestingly, Elizabeth and Victoria and Katherine and Anne, the four-legged stool of classic girls' names linked inextricably with royalty, seem to be absent. Along with Jane, itself.
The real old lady names, like Dorothy, Dora, Edith, Sylvia, Edna, Agatha, Gladys, Mary, Sarah, Delores, are pre-WWII. They're the great-grandmother names. Only Sarah seemed to carry over on both sides of the Pond. In Britain, the case is slightly different for names like Mary and Sylvia, the latter still carrying an aura of horsey bawdy aristas.
Now, the grandmother names, and presumably grandmothers are old ladies, are the types that became popular in 1950s, Mary Debbie Linda Janet Susan Patricia Kathleen, and, of course, the now dreaded Karen, another victim of the latest casual brand of acceptable misogyny with a "redeeming" veneer of class contempt. Elizabeth did well in that era, too, as it leant itself to "cute" nicknames like the very popular Beth.
Flower names were almost all on the UK side of the Pond until about ten years ago, when Violet started making its appearance in Ametica. I'm waiting for Marigold, the name of the little daughter Churchill lost at three, to dawn.
If it sounds classic, English, aristocratic, horsey, these days it will fly.
But most of us will be dead before those bland, boring, 1950s Sandra Dee names return.