- ysaas : "aa" is extremely rare in Spanish (I can only think of "Aaron" and the last name "Saavedra") and no words would start with "ys" (are you using "y" as a vowel?), at least with modern spelling.
- gabrah: The ending "h" is not common either.
- wendra: "W" is almost not part of the language. There are a few Spanish names with "w" but they come from Gothic (Wamba, Wenceslao...).
I've tried with Spanish, English and Japanese toponyms, and also with a list of Star Wars character names (all around 500 inputs). I was pretty satisfied with the results, but perhaps I am more easily satisfied than you are.