), civil servant and Social Democratic politician who served as acting Prime Minister of Sweden 6–11 October 1946, following the death of Per Albin Hansson (1885-1946).

A bronze memorial plate featuring the Bulgarian and Swedish coats of arms and an inscription regarding the name's origin were placed on top of the peak.

He belonged, together with Ernst Wigforss (1881–1977) clearly to the left-wing faction of the Social Democrats, and has in retrospect been criticised for a much too rosy view of the Soviet Union that remained for all of his time as Foreign Minister, ending in 1962.

[6] At the same time, Undén must be acknowledged as a chief representative for Sweden's covert Cold War adaptation to the United States, as in his view Swedish governmental agencies, including the Defence Forces, were free to conclude any agreements with foreign powers and agencies that did not literally contradict international treaties Sweden was a party of as long as he and his ministry were not formally involved.

As an effect, the Swedish government could even, before the founding of NATO, agree to build air bases in eastern Scandinavia suitable for bombing missions against Leningrad.