István Bánffy de Losoncz was born 28 December 1898 in Gheja, Mureș County, Romania to János Bánffy de Losoncz (1870-1946) and Róza Ugron de Ábránfalva (1874-1953) and died 30 October 1944 Debrecen, Hajdú-Bihar County, Hungary of Killed in Action. He married Emma Mikes de Zabola (1899-1929) .
|Offspring of István Bánffy de Losoncz and Emma Mikes de Zabola (1899-1929)|
|Mária Bánffy de Losoncz (1926)||27 July 1926 Cluj-Napoca, Cluj County, Romania||István Ugron de Ábránfalva (1917-1997)|
|István Bánffy de Losoncz (1928-2005)||31 October 1928 Cluj-Napoca, Cluj County, Romania||7 January 2005 Pannonhalma, Győr-Moson-Sopron County, Hungary|