There are very few genuinely Hebrew names. Most come from other cultures and languages. Avram, Sarai, MOSHE (comes from Egyptian, you know), Yenta (French), etc.
All names in the Torah are in Loshon Kodesh, whatever their origin. If Batya spoke only Egyptian, she obviously did not say ki min hamayim m’shiseehu, but rather the Egyptian form of that expression. Hashem told Moshe Rabeinu what to write in Sefer Shemos, when telling that over.
Chcham – I would tend to think that those Adolphs in the Jewish cemetery in Warsaw, were probably given those names BEFORE Hitler rose to power. How many Adolphs do you think are being thus named by Jews, since WWII? And what does “Bernard” have to do with anything? We acknowledge that many people have adopted secular names. So many Yiddish names are also secular, whether or not people want to admit that. They are often based in Germanic words.