Sources from the turn of the 9th and 10th centuries mentioned more than a dozen persons who played an important role in the history of the Carpathian Basin at the time of the Hungarian Conquest. Anonymus did not mention any of them; he did not refer, for instance, to Emperor Arnulf of Carinthia, Boris I of Bulgaria, and Svatopluk I of Moravia. On the other hand, none of the persons whom Anonymus listed among the opponents of the conquering Hungarians—for instance, the Bulgarian Salan, the Khazar Menumorut and the Vlach Gelouwere mentioned in other sources. According to Györffy, Engel, and other historians, Anonymus either invented these personalities or listed them anachronistically among the conquering Hungarians' opponents. Martyn Rady and László Veszprémy explicitly describe the "Gesta Hungarorum" as a "'toponymic romance'that seeks to explain place-names by reference to imagined events or persons, and vice versa." For instance, Györffy writes that Gelou's story was based on the conquest of Gyula of Transylvania's realm by Stephen I of Hungary in the early 11th century and Gelou was named after the town Gilău where he was killed in battle, according to Anonymus. Anonymus likewise wrote that the Bulgarian Laborec had died at the River Laborec and the Czech Zubur on the Mount Zobor near Nitra.