Éowyn

The diphthong éo is effectively extinct in English, and pronunciation is doubly difficult since Tolkien's example, the name Theobald, is also rare. The vowel-sound of the word 'ear' comes close to the correct pronunciation.

Theobald, incidentally, is a real Old English name, of the kind that might have been used by the Rohirrim, though they would likely have rendered it Théodbold. It combines the elements théod 'people' and bald 'bold'.

We know that Éowyn had a grandson, Barahir, so we can be certain that she had at least one child. In volume 12 of The History of Middle-earth, that child is named, in the drafts of the Appendices to The Lord of the Rings, as Elboron, the second Prince of Ithilien. However, 'Elboron' (or any other name for Éowyn's child) is absent from the final text of The Lord of the Rings, so his status is rather uncertain.