Mara Branković (Serbian Cyrillic: Мара Бранковић; c. 1420 – 14 September 1487), or Mara Despina Hatun, in Europe also known as Amerissa, Sultana Maria or Sultanina, was the daughter of Serbian monarch Đurađ Branković and Eirene Kantakouzene.

Known as the "mistress of the Christian noblewomen," she promoted cooperation during periods of significant tension between Europe and the Ottoman Empire.

Mara and her relations are named in "Dell'Imperadori Constantinopolitani", a manuscript held at the Vatican Library.

Fine, Grgur was appointed governor of territories of southern Serbia associated with the House of Branković.

[3] According to Monumenta Serbica Spectantia Historiam Serbiae, Bosniae, Ragusii (1858) by Franz Miklosich, Grgur and his brothers co-signed a charter by which Đurađ confirmed the privileges of the Republic of Ragusa.

Next are listed Stefan Branković and "Cantacuzina", a sister with the Latinized form of their mother's last name.

[8] According to the chronicle of George Sphrantzes, Mara was going back to her parents when Murad II died, dating her return to 1451.

Sphrantzes records that the widow rejected a marriage proposal by Constantine XI, Byzantine Emperor.

[9] Sphrantzes records that when her parents died (in 1456–1457), Mara joined the court of her stepson Mehmed II.

[11] She retained her influence over the appointment of leaders of the Orthodox Church, and remained influential during the reign of Mehmed's successor[dubious – discuss], Bayezid II.

Because of her influence, special privileges were offered to the Greek Orthodox Christians of Jerusalem, later extended to the community of Athos Monastery.