It would be nice to know your name so I can respond properly. The only family of Stoop that I know of that changed their name was a Stoop family from Shamokin, PA. When their ancestor came to America, he spelled his last name as CZAP. This is how you spell Stoop in Polish, it is pronounced STOOP though spelled CZAP. To blend in and become "more" American, he simply changed the spelling to the more phonetic STOOP.