As Zlatica points out, the first step is to properly identify the location. For that, we need to start with your source for "Letnia, Galacia". Where was this written, and when? If it was handwritten, is this your reading, or an indexer's? (If it was typed, it's the typist's reading of something, adding an extra layer of difficulty.) Any chance of a link or attached image?
Also as Zlatica points out, you're probably on the wrong message board: I don't think any of the Austrian crown land called Galicia ended up in Slovakia. (There's a formidable natural border between the two called the Carpathian Mountains.) Of course it's possible that the "Galacia" part is wrong in more than just spelling, but we can't assume that.