| Birth Date: | 4 April 1897 |
| Birth Place: | Stockholm, Sweden |
| Death Date: | 26 April 1977 |
| Death Place: | Stockholm, Sweden |
| Occupation: | diplomat |
| Office: | Grand Master of the Ceremonies |
| Term Start: | 1971 |
| Term End: | 1977 |
| Office1: | Marshal of the Diplomatic Corps |
| Term Start1: | 1970 |
| Term End1: | 1974 |
| Office2: | Ambassador of Sweden to Liberia |
| Term2: | 1959–1961 |
| Office3: | Ambassador of Sweden to Portugal |
| Term3: | 1959–1963 |
Gregor Iwan Alexis Feodor Aminoff (4 April 1897 – 26 April 1977) was a Swedish diplomat and chamberlain.
Aminoff was born on 4 April 1897 in Stockholm, Sweden, son of the cabinet chamberlain Gregor Aminoff and his wife Elisabeth (née af Edholm). He served as ryttmästare in the Life Regiment of Horse (K 1) in 1934 and received a Bachelor of Arts degree in 1925.
Aminoff became an attaché at the Ministry for Foreign Affairs in Stockholm in 1926. Aminoff left in 1928 and then worked in private companies. He served as chamberlain of the Duke and Duchess of Västergotland from 1935 to 1950, and he was back at the Foreign Ministry in 1938.[1]
Aminoff became first secretary in 1939, first legation secretary in London in 1941, in Washington, D.C. in 1943, and was legation counsellor there in 1943. He was envoy in Athens from 1949 to 1951 and foreign affairs councillor and head of the human resources department at the Foreign Ministry from 1951 to 1954. Aminoff was then envoy in Pretoria from 1954 to 1959, ambassador in Lisbon from 1959 to 1963 and ambassador in Monrovia from 1959 to 1961 (accredited from Lisbon). He was Marshal of the Diplomatic Corps (Introduktör av främmande sändebud) from 1970 to 1974 (deputy in 1966) and Grand Master of the Ceremonies from 1971 to 1977.[1]
In 1925 he married Märtha Linder (1900–1991),[2] the daughter of general Ernst Linder and baroness Augusta (née Wrangel von Brehmer). He was the father of Gregor (born 1926) and Alexandra (born 1933).[3] He died on 26 April 1977 in Stockholm and was buried at Norra begravningsplatsen in Stockholm.[2]
King Gustaf V's Jubilee Commemorative Medal (1948)[4] Commander 1st Class of the Order of the Polar Star[5] Knight of the Order of Vasa[4]
Grand Cross of the Order of Prince Henry[3]
Grand Cross of the Order of the Phoenix[4]
Grand Commander of the Humane Order of African Redemption[3]
Commander 1st Class of the Order of the Dannebrog[4]
Commander of the Order of St. Olav with star[4]
Commander of the Order of the Crown[4]
Commander of the Order of the White Rose of Finland[4]
Commander of the Order of the Crown of Italy[4]
Commander of the Order of Polonia Restituta[4]
Knight of the Legion of Honour[4]