Last name Bratbak (Bratbak 
) , around the world, is a very rare cognomen. The surname Bratbak is characteristic of Norway, where it is a rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Bratbak | Norway, United States |
| daniel fossum bratbak researcher |
|
|
| gunnar bratbak researcher, ORCID id # 0000-0001-8388-4945 |
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