• Letter writers by century (7 C, 1 P)
• Letter writers by correspondent (8 C)

;

• Letter writers in Latin (7 C, 72 P)
• Urdu-language letter writers (4 P)

:

• Ancient letter writers (2 C, 12 P)
• Medieval letter writers (2 C, 9 P)

+

• Women letter writers (3 C, 64 P)

A

• American letter writers (4 C)

B

• British letter writers (7 C, 1 P)

D

• Danish letter writers (3 C)
• Dutch letter writers (1 C, 1 P)

F

• French letter writers (5 C, 2 P)

G

• German letter writers (3 C, 3 P)
• Greek letter writers (1 C, 1 P)

H

• Hungarian letter writers (3 P)

I

• Italian letter writers (2 C, 8 P)

M

• Moroccan letter writers (9 P)

P

• Polish letter writers (2 C)

R

• Romanian letter writers (3 P)
• Russian letter writers (1 C, 2 P)

S

• Swedish letter writers (1 C, 4 P)
• Syrian letter writers (1 C)