...that the discussion developed a sideline about whether these topknots were referred to as "buttons" because the word "bead" had low-class connotations. Tsk!

Just a quick flyover of Google images revealed that little silk buttons, as well as decorative knots, were used on everyday hats. So this finial-type decoration for court hats could be viewed simply as an extension of the concept of the everyday hat button - court hats featuring a big, fancy "button" composed of a bead and metal work.

I wish we could all dress so comfortably in tailored gowns, capes, and long counterweighted necklaces. Hmmmm.... [eyes attic boxes overflowing with beads]