[1] Maria's marriage to Ulrich V, Count of Helfenstein,[2][3][4] was most likely arranged by his overlord, Holy Roman Emperor Charles IV.

Maria too was aware of her higher status and, in addition to the title Countess of Helfenstein, often referred to herself as Duchess of Bosnia.

Early in their marriage, Maria pushed her husband to divide the county he had jointly ruled with his cousin and namesake, Ulrich the Younger.

They had six sons – Frederick (born in 1357), Louis, William, Conrad, Ulrich and John, and three daughters – Agnes, Beatrix and Maria.

Three of their sons had chosen ecclesiastical careers, with Louis becoming Archbishop of Kalocsa in 1382, probably thanks to Maria's connection to the Hungarian royal family.

[1] Nevertheless, Maria left a significant mark on the city, financing, among other things, the construction of a hospital in Geislingen an der Steige in Baden-Württemberg, Germany.

Prilog heraldici Nemanjića i Kotromanića (The Seal and Funerary Inscription of Mary, Duchess of Bosnia and Countess of Helfenstein.