Definition of "Undine"

The child, on the contrary, would by no means listen to this, declaring she had been called Undine by her parents, and Undine she would still be called. Now this seemed to me a Pagan name, which stood in no calendar, and therefore I took counsel of a priest in the city.

1818 Translation by George Soane of Undine (1811) by Friedrich de la Motte Fouqué, W.Simpkin and R. Marshall, pages 24-25