Who married Hélène De Toerring Jettenbach?

Archduke Ferdinand of Austria married Hélène De Toerring Jettenbach on April 6, 1956. Archduchess Helene, Archduchess Ferdinand of Austria was 18 years old on the wedding day (18 years, 10 months and 17 days). Archduke Ferdinand of Austria was 37 years old on the wedding day (37 years, 4 months and 0 days). The age gap was 18 years, 5 months and 14 days.