Söderberg is a common Swedish surname. Variations of the name include Soderberg and Soderbergh. . Geographical distribution. As of 2014, 95.5% of all known bearers of the surname Söderberg were residents of Sweden (frequency 1:828) and 2.8% of Finland (1:15,705). In Sweden, the frequency of the surname was higher than national average (1:828) in the following counties: 1. Västernorrland County (1:305) 2. Gotland County (1:406) 3. Västmanland County (1:489) 4. Södermanland County (1:547) 5. Jämtland County (1:548) 6. Uppsala County (1:574) 7. Dalarna County (1:632) 8.
https://en.wikipedia.org/wiki/S%C3%B6derberg