Lackfi

The Lackfi were a noble house of the fourteenth-century Kingdom of Hungary, named after Lack of the Hermán kindred, Count of the Székelys from 1328. His descendants held high office under the Angevin kings.

From their Transylvanian seats around Mediaș the family supplied Voivodes of Transylvania and Counts of the Székelys. Andrew Lackfi took his father's countship in 1343 and led the Székelys across the Carpathians to crush a Tatar army of the Golden Horde in 1345. He served as Viceroy of Naples in 1350–1352 and ruled Transylvania until his death in 1359.

Maria Lackfi was the wife of Prince Nicholas Alexander and mother of Vladislav I Vlaicu. The house's power ended under King Sigismund: Andrew's kinsman Stephen II was killed at the Bloody Sabor of Križevci in 1397, after which the surviving branch retired to its Croatian estates.