William Weisz born 1900 in Komarno, Slovakia presents a great example of how Jews from Austria-Hungary often have their names spelled differently in every document.
VILÉM on a birth certificate issued 1923 and another certificate from 1938
VILHELM in the marriage certificate from 1926 and another marriage certificate
https://www.geni.com/photo/view?album_type=photos_of_me&id=6000000185610788904&photo_id=6000000185686447897&position=2
WILLIAM on ship manifest, naturalization, US Social Security, death certificate