(Informal names for unknown persons in various countries)

Türkiye – Sarı çizmeli Mehmet Ağa
Argentina – Juan Pérez
Australia – Fred Nerk
Austria – Hans Meier
Belgium – Jean Dupont
Bosnia and Herzegovina – Marko Markovic
Brazil – Fulano de Tal
Bulgaria – Ivan Ivanov
Canada – G. Raymond
Chile – Juan Pérez
China – Wúmíng Shì
Colombia – Fulano de Tal
Croatia – Ivan Horvat
Cuba – Fulano de Tal
Czech Republic – Jan Novák
Ecuador – Juan Perez
Estonia – Jaan Tamm
Finland – Matti Meikäläinen
France – Jean Dupont
Germany – Hans Mustermann
Greece – Giorgos Tade
Guatemala – Juan Pérez
Hungary – Gipsz Jakab
Iceland – Meðal-Jón
India – Naamalum
Indonesia – Si Anu
Iran – Folani
Ireland – Seán Ó Rudaí
Israel – Israel Israeli
Italy – Mario Rossi
Japan – Yamada Taro
Latvia – Jānis Bērziņš
Lithuania – Vardenis Pavardenis
Macedonia – Petar Petrovski
Malaysia – Si Anu
Malta – Joe Borg
Mexico – Juan Pérez
Netherlands – Jan Jansen
New Zealand – Joe Bloggs
Nigeria – Lagbaja
Pakistan – Falana
Panama – Juan Pérez
Paraguay – Juan Pérez
Peru – Juan Pérez
Philippines – Juan dela Cruz
Poland – Jan Kowalski
Portugal – Fulano
Puerto Rico – Fulano de Tal
Romania – Ion Popescu
Russia – Ivanov Ivan Ivanovich
Serbia and Montenegro – Petar Petrović
Slovakia – Ján Novák
Slovenia – Janez Novak
South Africa – Koos van der Merwe
Spain – Fulano de Tal
Sweden – Svensson
Switzerland – Hans Meier
Thailand – Nai Gor
United Kingdom – Joe Bloggs
United States – John Doe
Uruguay – Fulano
Venezuela – Fulano

Kaynak: http://www.nationmaster.com/graph/lan_joh_doe_inf_nam_for_unk_or_uns_per_in_var_cou-unspecified-persons-various-countries-regions