Grand-duc

The Grand-duc and Grande-duchesse Cyril, with their children, are expected at the Elysée Palace, Cannes, for the winter.

Source: wiktionary

To one side was a small pavilion that would, the backers hoped, eventually house the private art collection of the grand-duc and his wife.

Source: wiktionary

[Louise Lévêque de] Vilmorin covered the Kelly-Grimaldi nuptials in Monaco in 1956, skewering the American guests, whom she stops just short of calling hayseeds, for “thinking they’d been transported to the era of grands-ducs and grands bancos.”

Source: wiktionary

The most important introduction Gontaut made for her was to Grand-Duc and Grande-Duchesse Wladimir of Russia, the GDWs to their intimates.

Source: wiktionary