Carl Johan Arthur Bernadotte, Count of Wisborg, KmstkNO (originally Prince Carl Johan Arthur of Sweden, Duke of Dalarna; 31 October 1916 – 5 May 2012) was the fifth and youngest child, and the fourth and youngest son, of King Gustaf VI Adolf of Sweden and his first wife Princess Margaret of Connaught. He was a paternal uncle of King Carl XVI Gustaf of Sweden and a maternal uncle of Queen Margrethe II of Denmark and Queen Anne-Marie of Greece.

Bernadotte lost his succession rights to the Swedish throne and renounced his titles in 1946 when he married in New York City, on 19 February a woman who was not of equal rank (i.e., not of a sovereign house), the journalist Elin Kerstin Margaretha Wijkmark (4 October 1910 in – 11 September 1987 in Båstad), daughter of Henning Wijkmark and wife Elin Larsson.

They adopted two children:

The Bernadottes lived for some time in New York, where he worked as the representative of the Anglo-Nordic Trading Company. They made friends with the film star Greta Garbo, who stayed with them in their Swedish home near Båstad.

On 29 September 1988, the widowed Count married Countess Gunnila Märtha Louise Wachtmeister af Johannishus (12 May 1923 – 12 September 2016) in Copenhagen. She was the daughter of Count Nils Wachtmeister af Johannishus and Baroness Märta de Geer af Leufsta and at the time of her marriage to Bernadotte was the widow of Carl-Herman Bussler. She married Carl-Herman Bussler in 1942; the couple had three children together. In 1988, she married Bernadotte.

When marrying morganatically on 19 February 1946 he lost his Swedish royal titles, i.e. Prince of Sweden and Duke of Dalarna. He subsequently assumed the surname Bernadotte, the name of the Swedish Royal Family.

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