Kaplon (Caplon, Coplyon, Caplan, Coplyan, Kaplyon, Kaplyn, Koplon, Koplen, Kopplyan) was the name of a gens (Latin for "clan"; nemzetség in Hungarian) in the Kingdom of Hungary. The founder and ancestor of the genus was Kaplon (or Cupan), the second son of Kond, who was one of the seven chieftains of the Magyars according to Anonymus, author of the Gesta Hungarorum. The clan's original tribal area was the Nyírség, northeastern part of the Great Hungarian Plain.
|Genus (gens) Kaplon|
|Country||Principality of Hungary|
Kingdom of Hungary
|Cadet branches||House of Bagossy|
House of Csomaközy
House of Károlyi
House of Vadai
House of Vetési
The distinguished and influential Károlyi Family originates from the Genus Kaplon. The Bagossy, Csomaközy, Vadai and Vetési families were also from that clan and had spread northward, eastward and southward.