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Here are some maps of naming conventions around the world. Which one does your name follow? I'm from the Portuguese tradition but here in Brazil some people also have one, three or even more family names.
In this one I think "Maternal/Paternal name" means the Maternal/Paternal surname, while "Father's name" is a Patronymic.
As for the one below, I'm not sure what the difference between a family name/surname and a clan name is.
Here one can also see which percentage of the population possesses the most common surnames in a few countries. Some countries do have more diversity of surname than others. I know that in Italy some family names can be almost exclusive to a small number of neighboring villages.
Do you have a common or a rare surname?
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