In 1347, King Louis I took their estates around Bribir, most importantly the strategic fortress at Ostrovica, in Dalmatia, and gave them the Zrin estate with Zrin Castle,[8] located south of the modern city of Petrinja and west of Hrvatska Kostajnica, in what was then Slavonia and is today the Croatian region of Banovina.

Elizabeth's and Louis' daughters succeeded their father and became queens in their own right, as Mary of Hungary and Jadwiga of Poland.

On the other hand, they are also identified as hungarus or natio hungarica, which means "somebody from the Kingdom of Hungary", regardless of the language spoken and nationality.

Because they lived, worked, and intermarried with nobility from all parts of the multiethnic kingdom, it was natural and expected that they should be fluent in four or five languages.

The Zrinski and the Frankopan families were the two most prominent noble families in Croatia in 16th and 17th century and they both perished in 1671 when Petar Zrinski and Fran Krsto Frankopan were charged with treason by the Emperor Leopold I, owing it to their role in the so-called Zrinski-Frankopan Plot (in Hungarian historiography called the Wesselényi Plot), and executed in Wiener Neustadt.

The remains of Petar Zrinski and Fran Krsto Frankopan were transferred from Austria to Croatia in 1919 and buried in the Zagreb Cathedral.

[11] According to oral tradition, there was a Zrinski member, Martin Zrinski (1462–1508), who was hidden by the Habsburgs in a Venetian army as an officer of the cavalry in the 16th century and the Venetian Republic sent him as Martino Zdrin (or Sdrigna) to the island of Cephalonia in Greece where he eventually settled, and the family was recorded in the gold book of island's nobility as Sdrin, Sdrinia, Sdrigna, and Zrin.

Some castles, like Dubovac, Kraljevica, Ozalj, Severin na Kupi and others were jointly owned with Frankopan family.