This list arises from James' and Main Mask's nominations of Monsieur Montréal and Klondike Kate elsewhere. I have added a couple but I believe this will be tough. It's the wrestlers' principal ring names we need here.
Locals North Americans Internationals
Johnny England Klondikes...Bill, Kate, Jake The Wild Man of Borneo
Eric Leyland Mississippi Mauler Le Bourreau de Béthune
Belfast Bruiser Mike Dallas The Bengal Tigers
Eric Leyland Monsieur Montréal Isha Israel
Boston Blackie Alaskan Tasker Kendo Nagasaki
Yorkshire Kid (Hack explains below) Kansas City Bomber Hungarian Horsemen
Roy & Tony St. Clair Texas Jack Bence Magnificent Magyars
The South London Tough Guys Catalina George Drake The Hellenes
The Lincolnshire Poachers Cheyenne The Iron Greek
The Wiganers Harlem Jim Brown Leon Arras
Miss Scotland Texas Ted Heath Miss Portugal
The Mighty Ince Hellfire Montana Stars of India
The Liverpool Skinheads (Terry O'Neill is now 3 times on these lists.) Mongolian Mauler
Jamaica George
Jamaica Kid
Kilkenny Cat
Frank Malmoa
Under Review
Jack London
The Johannesburg Giant Jan Wilko - above or below?
The following subsidiary list will yield a lot more, I'm sure:
Wrestlers' Geographical Bylines
The Polish Eagle (Johnny Czeslaw & Vladimir Waldberg,)
The Butcher of Budapest (Josef Kovacs)
The Dulwich Destroyer (McManus)
The Yorkshire Farmer (Kellett)
The African Witchdoctor (Masambula)
The Chicago Express (Tornado Torontos)
The Doncaster Panther (Jack Pye)
The Scourge of the East (Ahmet Chong)
The Terror from the North (Klondyke Jake: from Devon!)
The Portsmouth Adonis (Bob Kirkwood)
The Hampshire Farmer (John Kowalski)
The Welsh Wizard (Tony Charles)
The Cockney Kid (Tony Scarlo et al.)
The Russian Lion (Hackenschmidt)
The Terrible Turk (Ahmed Madrali)
The Walthamstow Bear (John Elijah)
Giant El Paso Cowboy (Ski Hi Lee)
As usual, all must have wrestled in the UK.
Any more?
Coincidentals
We are really looking for wrestlers who creatively chose in some way their geographical epithets. Some, listed here, just happened to have surnames that were also places:
Jack Atherton Bernard Bradford Peter Preston Derek Oldham
Alf Kent Alec Burton Roger Wells Paul Lincoln
John Lees Judo Al Hayes Tom Nelson Bruno Elrington
Bert Mansfield Flash Jordan Chesterfield Smith Blackburn Roberts
Bill Stirling Ray Crawley Cyclone Stockton Vicky Montrose
Buster Kilburn Eric Brazil Tom Tyrone Big Bill Bromley
Rocco Colombo Johnny Stafford Kiwi Kingston Tony Barry
Young Chester
Here's a rare shot of The Scourge of the East:
Sorry it's in colour.