Karin Kajsa Rothman (1903–1969) was a multilingual activist, journalist and the first Swedish volunteer in the Spanish Civil War.

According to Hannson, she spent 3 years as a professional marathon dancer in competitions that required couples to dance round the clock with the winner lasting the longest.

There, she took advantage of her multilingual skills in: English, French, German, Spanish, Italian, Romanian, Armenian and Arabic in addition to her native Swedish.

In July 1936, when the Spanish Civil War broke out, she was the first Swede to volunteer to serve and took a position as a Red Cross nurse.

In an article that appeared in her father's paper, Karlstads Tidning titled “Give Bruno new hands,” she published an urgent appeal for readers to contribute to his care.

[2][4] Upon returning to Sweden, she wrote a book titled Spanska barn ritar om kriget (Spanish children draw the war) in 1937.