A bonnet.
A Christening bonnet.
Robin Hood
cap and gown. the hat is called a mortarboard.
a leperchaun's hat :P
It's called a homburg hat
Its called a hat box
According to Irish folklore, it's called a cocked hat.
A guardsman hat is called 'Bear Skin'
Mario and green hat
probably sailor hat
Its called a Tri-Corn Hat
a pilgrim hat is called a pilly hat