Bonnet

Gu 3 bonnets 2 and 1
1. (French Coiffe) A type of feminine headwear.
2. The coronet's crimson velvet cap with a gold tassel guarded with ermine appearing below the rim of the coronet.
Illustrated:
The coronet of a marquess worn about a bonnet.
Electoral Bonnet

This cap was borne over the escutcheon of pretence, charged with the arms of the dominions in Germany of King George III, in the centre of the royal arms of England, until the electorate of Hanover was declared a sovereign state.