The Capotain (Copotain/Capatain) is tall wide-brimmed hat worn during the late 16th and 17th centuries
The hat is associated with Puritans and English Civil War
The hat is also with Pilgrim that settled in the Plymouth colony America in 1620, hence its often also called a Pilgrims Hat
The hat is also worn by witchfinders and had a buckle on the front of the crown, but both of these are images created in 19th Century fiction probably untrue.