Definition of "coronetted"

These monstrous portents that before me rise Of mitred pimps, and coronetted spies!

1821, anonymous author, The Ghost of Chatham; A Vision‎

--He kept his pills in a bag, and used to dole them out to his patients; and on doing so to a lady who stepped out of a coronetted carriage to consult him, she declared they made her sick, and she could never take a pill.

1831, Various, The Mirror of Literature, Amusement, and Instruction, Vol. 17,‎

Then came a few more carriages containing very nice people with whom we have here but little concern; and then Miss Brenda, deeply regretting her beautiful Napier, with her father and mother in a very smart Savoy turn-out followed by a coronetted brougham drawn by a splendid pair of black Orloffs.

1976, George Griffith, The Mummy and Miss Nitocris‎