She was, after all, the only child of the Duke of Chiltern.

In 1906 he married Lady Mary Douglas-Hamilton, the only child of the 12th Duke of Hamilton.

Pias Bavol was the eldest child of the Duke of Newforest.

It is possible, although it cannot be firmly established, that Elizabeth was in fact an illegitimate child of the Duke of York.

In 1898, the Queen passed letters patent granting the children of the Duke and Duchess of York the style, Royal Highness.

The last surviving child of the Duke and Duchess of Bouillon.

I am the only child of the Duke of Toumarre.

Pias is the eldest child of the Duke of Newforest, which makes him a marquis and heir to the entire planet.

Upon the death without children of the last Duke of Alençon in 1525, it returned to the crown, and was granted only sporadically thereafter.

After providing writing tuition to the children of the Duke of Marlborough, he obtained a title for holy orders in 1781.