Last name Rosaas (Rosaas 
) , worldwide, is a very rare family name. The cognomen Rosaas is characteristic of Norway, where it is a rare surname, Mexico, where it is an extremely rare surname, and France.
| juline elisabeth rosaas Norwegian missionary (1841-1923) (b. 1841) |
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| thorkild guttormsen rosaas Norwegian missionary (1841-1913) (b. 1841) |
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| theodora rosaas Norwegian missionary (1873-1900) (b. 1873) |
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| johanna mathea rosaas Norwegian missionary (1880-1905) (b. 1880) |
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