Letter

Population

City

A

3,375,000

Athens

B

4,700,000

Barcelona

C

1,650,000

Copenhagen

D

1,370,000

Dublin

E

583,084

Essen

F

3,225,000

Frankfurt

G

1,660,000

Glasgow

H

2,825,000

Hamburg

I

14,800,000

Istanbul

J

212,876

Jerez de la Frontera

K

3,450,000

Kiev

L

14,600,000

London

M

17,000,000

Moscow


Letter

Population

City

N

4,225,000

Naples

O

1,170,000

Oslo

P

11,300,000

Paris

Q

127,286

Quimper

R

3,600,000

Rome

S

5,550,000

Saint Petersburg

T

1,660,000

Turin

U

1,130,000

Ufa

V

2,250,000

Vienna

W

2,230,000

Warsaw

X

70,873

Xanthi

Y

1,630,000

Yekaterinburg

Z

1,400,000

Zürich


Edit: nvm, I found it another way ;)
If you consider the municipality population:
Rome: 2,869,461 vs Naples: 990,000 (2014 estimate)
If you consider the metropolitan population:
Rome: 4,321,244 vs Naples: 3,128,000 (2014 estimate)
(English version gives city proper only)
Should ve gotten zurich, glasgow and I guess naples too.
I did get essen of the ones that didnt score too high. Hadnt heard of the ujqx ones.
🤦♂️🤦♂️🤦♂️