Who are these ladies and how are they related?
Answer OC was looking for: They are indeed related through Christian IX.
Victoria Marichalar–>Elena of Spain–>Sofia of Greece–>Fredericka of Hanover–>Ernest Augustus of Hanover–>Thyra of Denmark (daughter of Christian IX).
Margareta of Romania–>Anne of Bourbon Parma–>Margrethe of Denmark–>Valdemar of Denmark (son of Christian IX).
Victoria and Margareta are third cousins, twice removed.