In which country do people usually have two surnames?

Russia
2523
Spain
6262
Japan
825
Greece
1803
In most Spanish-speaking countries, the custom is for people to have two surnames, a paternal one (after the father) and a maternal one (after the mother). Thus, for instance, Spanish goalkeeper Iker Casillas Fernández has Iker as his given name, Casillas as his first surname, and Fernández as his second.
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