Holmström is a Swedish-language surname. Geographical distribution. As of 2014, 71.5% of all known bearers of the surname Holmström were residents of Sweden (frequency 1:1,444) and 26.7% of Finland (1:2,162). In Sweden, the frequency of the surname was higher than national average (1:1,444) in the following counties: 1. Västerbotten County (1:321) 2. Norrbotten County (1:534) 3. Västmanland County (1:1,179) 4. Blekinge County (1:1,184) 5. Gävleborg County (1:1,327) 6. Dalarna County (1:1,333) 7. Västernorrland County (1:1,333) 8.
https://en.wikipedia.org/wiki/Holmstr%C3%B6m