Cognomen Brynhildsen (Brynhildsen 
) , worldwide, is a rare last name. The last name Brynhildsen is characteristic of Norway, where it is quite a rare surname, and the United States, where it is an extremely rare surname. Much less frequently, Brynhildsen is the forename as well as the last name.
| john brynhildsen (b. 1852) |
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| john l. brynhildsen Norwegian writer and missionary (b. 1902) |
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| rune brynhildsen Norwegian journalist (b. 1965) |
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| karin falk brynhildsen researcher |
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| jan brynhildsen researcher |
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| ola brynhildsen Norwegian association football player (b. 1999) |
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