Yes. The reformation had taken hold in Hungary. When that was subsequently conquered by the Ottomans, they were allowed to retain their practice. The Ottomans thought of them as people of the book, like other types of Christians and Jews, and merely exacted some extra taxes from them in return for practicing their religion.

Parts of Hungary were quickly reconquered by the Habsburgs, who swiftly enacted a counter reformation, eradicating protestantism from the areas they controlled. Other areas remained under Ottoman control for much longer, thereby retaining their protestant beliefs. When these were finally retaken, the Habsburgs had become much less rigorous about stamping out protestantism, so as a result they retained it.

As a result, you will find protestants in these areas to this day. In modern Hungary they center around the Eastern city of Debrecen. There is also a sizable protestant population in Transsylvania, which holds a large Hungarian population.