Notes:

I believe whoever uploaded the image, or perhaps the artist themselves, has made a spelling mistake in the title.

Undine are a class of elemental water spirits from Greek Mythology that covers things like nymphs, mermaids and the like.

Udine is a city and commune in north-eastern Italy, in the middle of the Friuli-Venezia Giulia region, between the Adriatic Sea and the Alps.

As you can see, it's quite clear which one makes the most sense in context .