Comments by "Lynott Parris" (@DenUitvreter) on "Maps of the World that are Rather Interesting.." video.
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It's probably not taking in account naming conventions. Here in the Netherlands for example people have one up to five official first names, and than their first name which doesn't have to do anything with those, but usually does. The official name is often more biblical. So someone that is registered as Johannes wil go by the first name Johannes, Johan, Jan, Jo, Han, Hannes, Hans, John, Johnny, John pronounced as Sean, Sjon, and the female Johanna, has Jo, Joke, Hanna, Hannah, Hansje, Jans and Jantje. So the actual name for John should be Johannes rather than Jan, Jan is just most common first name version. Maybe the Fins got something similar and the registered first name is often that of the apostle.
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