Katalin Countess Bethlen de Bethlen was born 25 November 1700 in Bonyha, Mureş County, Transylvania, Holy Roman Empire to Sámuel Bethlen de Bethlen (1663-1708) and Borbála Nagy de Borsa and died 29 July 1759 Nagyszeben, Sibiu County, Transylvania, Holy Roman Empire of unspecified causes. She married László Haller de Hallerkeö (1697-1719) 11 September 1717 in Albești, Mureș County, Transylvania, Holy Roman Empire. She married József Teleki de Szék (c1675-1732) 26 May 1722 .
|Offspring of Katalin Countess Bethlen de Bethlen and László Haller de Hallerkeö (1697-1719)|
|Sámuel Haller de Hallerkeö (1718-1720)|
|Pál Haller de Hallerkeö (1718-1794)|
|Borbála Haller de Hallerkeö (1719-1770)||11 September 1719 Árokalja, Bistrița-Năsăud County, Transylvania, Romania||20 June 1770||Pál Teleki de Szék (1719-1773)|