drum shaped crowns no relation Welsh hat
The Welsh Hat
The distinctive features of Welsh hats are the broad, stiff, flat brim and the tall crown. There were two main shapes of crown: those with drum shaped crowns were worn in north-west Wales and those with slightly tapering crowns were found in the rest of Wales. 
They were probably originally made of felt (known as beaver, but not necessarily made of beaver fur), but most surviving examples are of silk plush (also sometimes known as beaver) on a stiffened buckram base. 
A third type of hat, known as the cockle hat, was worn in the Swansea area.
no relation