Sources

1) Source: The Henry Project . External Link
https://fasg.org/projects/henryproject/data/edmun002.htm. Reference: Eadmund "Ironside" (Questionable reliability of evidence)
2) Source: Chronica Magistri Rogeri de Houdene "Edmund Ironside before-named had a , Edward by name, who, shortly after the death of his father, through fear of king Canute, fled to the king of the Rugi, which we more properly call Russia; and the king of that country, Malesclotus by name, when he understood who he was, gave him an honourable reception. He there married a wife of noble birth, by whom he had Edgar Atheling, Margaret, afterwards queen of Scotland, and Christiana, her sister" (Data from secondary evidence)
3) Source: The Ecclesiastical History of England and Normandy: Volume III " Margaret was daughter of Edward exile of Hungary, who was son of Edmund, surnamed Ironsides, brother of Edward, king of England; the exiled Edward having married the daughter of Solomon, king of Hungary". Reference: 1093 (Data from secondary evidence)
4) Source: The Henry Project . External Link
https://fasg.org/projects/henryproject/data/ealdg000.htm. Reference: Ealdgyth (Aldgitha)
5) Source: The Henry Project . External Link
https://fasg.org/projects/henryproject/data/edwar000.htm. Reference: Eadweard "the Exile" (Questionable reliability of evidence)