He was the second son of Prince Magyar Arpad and Princess Therese. He lived his youth in Hercegfalva Palota.
Due to a trade deal, Kerkes (who was already in France), was sent to Château de Malmaison, where he met Joséphine.
Kerkes decided to marry her and he did so in March 1810.
She gave birth to his only son:
- Prince Pierre Árpád (1811-1860)