Princess Helene Cantacuzino Peerage person ID=544358 Parents Yelizaveta Daragan Alexandros Kantakouzinos Children Henry O'Donell, Count O'Donell of Tirconnell Siblings Senator Dimitrios Kantakouzinos Elpis Nadine Kantakouzinou Alexandru Cantacuzino Partners Maurice O'Donell, Graf O'Donell von Tyrconell