They don't seem to come from the same naming stable at all. Which might be what you're aiming for.
Eloise is trending and
Lana is vintage Hollywood;
Charlotte has been very popular and
Peggy is 1920s at best, though I did meet a
Peggy once who must have been a mid-70s baby.
FWIW, I like
Eloise and
Peggy, but not as a combo.