Hungary and Romania: Queen Marie and Transylvania

I got an email asking if Queen Marie's children married into any Hungarian royalty.

Here's the quick details:

Carol II:  Married a cousin int eh Greek Royal Family, but also married a Romanian Noblewoman.

Elizabeth: Married King George II of Greece.

Marie:  Married King Alexander of Yugoslavia.

Nicholas: Married a woman of Romanian origin.

Illena:  Married an Archduke of Austria.

Mircea: died at the age of Three.

So as for the Romania family there, the connection of Hungary and Romania is not there, but there is a lot of Ties with Transylvania and Queen Marie.