Who married Henry VII, Holy Roman Emperor?

Henry VII (German: Heinrich; Vulgar Latin: Arrigo; Italian: Enrico; Luxembourgish: Henri; 1275 or 1278/79 – 24 August 1313), also known as Henry of Luxembourg (German: Heinrich Von Luxemburg; Vulgar Latin: Arrigo de Luxemburgum; Italian: Enrico di Lussemburgo; Luxembourgish; Henri vu Lëtzebuerg), King of Germany and King of Italy numbering is Heinrich VIII, was Count of Luxembourg, King of Germany (Rex Romanorum) from 1308 and Holy Roman Emperor from 1312. He was the first emperor of the House of Luxembourg. During his brief career he reinvigorated the imperial cause in Italy, which was racked with the partisan struggles between the divided Guelph and Ghibelline factions, and inspired the praise of Dino Compagni and Dante Alighieri. He was the first emperor since the death of Frederick II in 1250, ending the Great Interregnum of the Holy Roman Empire; however, his premature death threatened to undo his life's work. His son, John of Bohemia, failed to be elected as his successor, and there was briefly another anti-king, Frederick the Fair, who contested the rule of Louis IV.

Margaret of Brabant (4 October 1276 – 14 December 1311), was the daughter of John I, Duke of Brabant and Margaret of Flanders. She was the wife of Henry, Count of Luxembourg, and after his election as King of Germany in 1308, she became Queen of Germany.