Margaret has been a favourite name for princesses and queens in Denmark.

There has been at least following personages who had been called as Queen Margaret of Denmark:

Margaret of Sweden, wife of king Nicholas of Denmark Niels of Denmark (born circa 1064 - died June 25, 1134), was king of Denmark following his brother Eric I. He was presumably the youngest son of king Sweyn Estridson and married Margaret, princess of Sweden, with whom he had prince Magnus. ...

Margaret of Bohemia, known also as Queen Dagmar, first wife of Valdemar II of Denmark Valdemar II (1170–1241), called Valdemar the Conqueror or Valdemar the Victorious, was the King of Denmark from 1202 until 1241. ...

Margaret Sambiria of Pomerelia, wife of king Christopher I of Denmark Queen consort of Christopher I of Denmark. ... Christopher I (1219-May 29, 1259) was king of Denmark between 1252 and 1259. ...

the ruler often known as Margaret I of Denmark, who was wife of Haakon VI of Norway and daughter of Valdemar IV of Denmark and mother of Olav III of Denmark and adoptive mother of Eric VII of Denmark and ruled also Denmark in her own right or as regent Seal of Margaret I of Denmark 1381 and 1403 Margaret I Queen of Denmark and Norway, Regent of Sweden (1353 – October 28, 1412) was born in Vordingborg Castle, the daughter of Valdemar IV of Denmark and Helvig of Sonderjylland. ... Haakon VI Magnusson (appr. ... Valdemar Atterdag (c. ... ... Eric of Pomerania, Erik af Pommern (Danish title), Erik av Pommern (Erik III) (Norwegian title) or Erik av Pommern (Eric XIII) (Swedish title), was adopted by Margaret I of Denmark and became king of Norway (1389-1442), of Denmark (1412-1439), and of Sweden and the Kalmar Union (1396-1439). ...

Queen Margaret II of Denmark, the present head of the state of denmark Her Majesty Queen Margrethe II (Margrethe Alexandrine Þorhildur Ingrid), styled HM The Queen (born April 16, 1940), is the Queen regnant and head of state of Denmark. ...