Gza Grdonyi, born Gza Ziegler was a Hungarian writer and journalist. Although he wrote a range of works, he had his greatest success as a historical novelist, particularly with Eclipse of the Crescent Moon and Slave of the Huns.
Grdonyi was born in Agrdpuszta, Kingdom of Hungary, the son of a machinist on the estate of an aristocrat in Western Hungary. He graduated at a college for teachers and worked for some years as a teacher and Catholic cantor. He married Mria Molnr in 1885, but their marriage was unhappy and they separated in 1892.
Source: Wikipedia