All of these are the forenames of notable lady writers. Jane Austen, Charlotte Bronte, Georgette Heyer, and Dorothy L. Sayers.
Could the connection be as simple as they are all writers?
They are indeed; more specifically, all female (obviously -- and none of them males writing under a pseudonym, pace highly "fringe" theories); and stock-in-trade of all of them, novels definitely in the love / romance ballpark. You've correctly identified all four: your floor.