The name wil continue to be used, might as well wonder why it became popu!ar.
There’s a “Jemima” up the family tree, even the street named after her was renamed. There’s another “Jemima” that married into the family, it can be confusing. But how often do you hear the name name, except for pancakes?
My great, great grandmother was named “Henrietta”, that’s not a common name now, but it got recycled back then, no surprise when families were large but population density was low.
My great, great grandfather remarried, to a “Laurenda”, and the name got reused in subsequent generatiins, including a cousin who died last year.
I don’t think “Heather” (my sister’s name), will fade like some if these names.