Gunnhildr Sveinsdóttir or Gunnhildr Haraldsdóttir, Guda or Gyda (traditionally died in Gudhem, Västergötland, Sweden, c. 1060) was a queen consort of king Anund Jacob of Sweden and of king Sveinn II of Denmark.
Following the first Mercury fly-by of NASA spacecraft MESSENGER, one of the newly discovered craters was named after Sveinsdóttir.
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Though best known for her painting, Sveinsdóttir was also a significant artist working in textiles, her commissions including a rug that decorated the court chamber of the Supreme Court in Copenhagen.