Kálmán Széll de Duka et Szentgyörgyvölgy was a Hungarian politician who served as Prime Minister of Hungary from 1899 to 1903.

The Bertha de Felsőőr family is a still existing Hungarian noble family from Vas county, who moved to Sopron and Zala counties also. The family received noble title in exchange for his service as a border guard at Oberwart (Felsőőr). The family's nobility was confirmed on July 1, 1327, by Charles I. The first documented family name version was on January 18, 1582, by Rudolf II in Pressburg, when the family members were Márton, Mihály and Ferenc Bertha.