Count 'Carl Gustaf Bloomfield Eric von Rosen (born June 2, 1879 in Stockholm, died April 25, 1948 Skeppsholmen, Stockholm) was a Swedish Honorary doctor, patron, explorer, ethnographer and prominent figure in the Swedish upper class nazi-movement during the 30's
von Rosen was married to Baroness Mary Fock (1886–1967) with whom he had six children: Bjorn (b. 1905), Mary (b. 1906), Carl Gustaf von Rosen (b. 1909), Birgitta (b. 1913), Egil (b. 1919), and Anna (b. 1926). Eric von Rosen's father was Count Carl Gustaf von Rosen and his mother was Ella Carlton Moore of Philadelphia, Pennsylvania. He was brother to Count Clarence von Rosen.
Von Rosen became brother-in-law to Hermann Göring when his wife's sister, Carin von Kantzow, married Göring. The pair became acquainted when Göring was flying Eric von Rosen in bad weather from Stockholm to Rockelstad Castle, at the lake Båven in Sörmland, Sweden. Due to bad weather conditions, Göring had to stay at the castle. There he became acquainted with the sister of von Rosen's wife, Carin von Kantzow. She was at that time married to a Swedish officer, but would be his big love and future wife.