What is A Line? - Different Types of hats

As i am working with Graph paper and Hats in a publication. My idea is to create a little zine or booklet that consists of little collages or bits of information and illustrations of a few different hats. Originally i tried to make it so that i would be doing a hat for every letter of the Alphabet but i think this is impossible :( However i have tried to come up with a list of hats by doing various bits of research and i will

Here is my collection of hats so far. I will add to this as i go along. I want to include the most iconic hats and create a booklet that has a collection of around 20 different collages (20 pages).

A -
B - Bicycle Cap, Beret, Beanie, Bonnet, Baseball Cap
C - Christmas Hat, Chinese Coolie Hat
D -
E - Elf Hat
F - Fez, Fedora, Flat Cap, Flat Peak
G -
H - Helmet, Hood
I -
J -
K -
L -
M - Matador Hat
N -
N -
O -
P - Pork Pie Hat, Propellor Hat, Pirate Hat
Q -
R - Robin Hood Hat
S - Snap Back, Sombrero, Skull Cap, Straw Hat
T - Trilby
U - Umbrella Hat
V -
W - Wooley Hat, War Bonnet
X
Y -
Z -