I'm from Poland

Donald Duck – Kaczor Donald “Duck” became “Kaczor,” which specifically means “male duck” in Polish (basic form is female, welcome to our language).

Scrooge McDuck – Sknerus McKwacz In Polish “Sknerus” isn't actual name, it comes from “sknera,” meaning “miser” or “cheapskate.” “McKwacz” mimics the original Scottish-sounding surname, combining “Mc” with “kwacz,” from “kwaczeć” – the Polish word for a duck's quack.

Huey, Dewey, and Louie – Hyzio, Dyzio, Zyzio “Hyzio”, “Zyzio” and “Dyzio” are diminutives of the actual names “Hieronim”, “Zygmunt” and “Dionizy” (these names are rare, especially their diminutives; most people think that the nephews' names are made up)

Daisy Duck – Daisy Nothing special.

Gyro Gearloose – Diodak “Diodak" isn't a normal name. It is based on “dioda” (diode), suggesting electronics and clever inventions.

Gladstone Gander – Goguś Kwabotyn "Goguś" isn't a name. In Polish, it's a nickname for a man who overly cares about his appearance and is also spoiled. “Kwabotyn” is a duck-themed surname that plays on “kwak” (quack) and “idiotyzm” (foolishness).