Joseph Kosma was a Hungarian composer who immigrated to France. His most famous composition is the standard Autumn Leaves. Source: en.wikipedia.org.
János Németh of Vadosfai and Zsidi, stage name Elemér Szentirmay was a Hungarian composer. He was one of the few composers whom Béla Bartók appreciated and Zoltán Kodály studied and recommended for study. Source: hu.wikipedia.org.