Sundberg is a Swedish surname (sund meaning Healthy, strait (as in a strait of water) berg meaning mountain). Geographical distribution. As of 2014, 54.1% of all known bearers of the surname Sundberg were residents of Sweden (frequency 1:955), 30.4% of the United States (1:62,338), 6.9% of Finland (1:4,190), 2.9% of Norway (1:9,436), 1.9% of Canada (1:99,186) and 1.4% of Denmark (1:21,220). In Sweden, the frequency of the surname was higher than national average (1:955) in the following counties: 1. Västernorrland County (1:327) 2. Gävleborg County (1:344) 3. Norrbotten County (1:398) 4.
https://en.wikipedia.org/wiki/Sundberg