Hold it right there – this isn't a proper writing style!
Fievel Mousekewitz is the main protagonist of An American Tail. While "Fievel" is the generally accepted spelling of his name, the opening credits spell it as "Feivel", the more common transliteration of the Yiddish name (פֿײַװל Fayvl). (Cf. Shraga Feivel Mendlowitz and Feivel Gruberger.) (The ending credits spell his name as "Fievel".) However, many English-speaking writers have come to adopt the spelling Fievel (with reversed i and first e) especially for this character; it was this spelling that was used on the film's poster, in promotional materials and tie-in merchandise, and in the title of the sequel An American Tail: Fievel Goes West. His last name is a play on the Jewish-Russian last name "Moskowitz", the name of the human occupants of the house his family is living under in the beginning of the film.