Thanks, this was very helpful. I managed to find his profile. Well, none of the data were fully accurate. The birth date was a bit off (9 September is always suspicious and turned out to be 27 September), the name spelled as Spevák, transcribed as Speválz and the first name was Venceslaus (indexed as Veneslaus) which is Vencel more accurately but may have sounded too exotic so he was called Vince.
Slovakia Church and Synagogue Books, 1592-1935, database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KDJK-FNW : 18 July 2017), Veneslaus Speválz, 28 Sep 1868; citing p. , 104, Baptism, Nekyje, Krupina, Slovakia, Odbor Archivnictva (The Archives of the Republic), Slovakia; FHL microfilm 2,193,935.
Now I am off to find the parents' wedding records...