Hultgren is a surname of Swedish origin meaning 'Forest Branch'. Geographical distribution. As of 2014, 51.3% of all known bearers of the surname Hultgren were residents of Sweden (frequency 1:3,116), 39.1% of the United States (1:150,084), 2.8% of Norway (1:29,725), 2.3% of Australia (1:169,813) and 1.9% of Argentina (1:374,943). In Sweden, the frequency of the surname was higher than national average (1:3,116) in the following counties: 1. Kalmar County (1:1,079) 2. Östergötland County (1:1,552) 3. Jönköping County (1:1,720) 4. Värmland County (1:1,862) 5. Blekinge County (1:1,974) 6.
https://en.wikipedia.org/wiki/Hultgren