Mary of Hungary was the daughter of Louis I the Great of Hungary. Mary acceded to the throne in 1382 . Her father had an arrangement with Sigismund to mary either one of the two sisters Hedwig orJadwiga, queen of Poland or Mary, queen of Hungary.
She was married to Sigismund and she died either in 1392 or 1395.
Sigismund and Mary had a daughter named Elisabeth. Elisabeth , wife of Casimir IV named the "mother of the Jagiellos", decended from their daughter Elisabeth.