In Croatia, Sommer families are Croats (from Pakrac ). In the past century, relatively most of Croatian residents bearing this family name were born in Pakrac and Zagreb.
Prevalence
About 40 people with faimily name Sommer live in Croatia today, in 20 households. There were 10 of them in the middle of the past century, and their number multiplied. They are located in 8 Croatian counties, in 9 cities and threee other places, mostly in Pakrac (10), Zagreb (<10), Srinjine (<5), Omis (<5), and in Pakostane in Biograd na moru area (<5).
Outside Croatia
Family name Sommer (including: Szommer , Shommer ) is present in 90 countries worldwide. The family name "Sommer " is used by some 80000 people in Germany , about 20000 in the United States , and some 7000 people in Brazil.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.