I found Johan Wittek's marriage record, 1st entry on the left page:
http://actapublica.eu/matriky/brno/prohlizec/5133/?strana=16 . It is very hard to read.
Groom: Johann Wittek, (Unterjäger beim k.k. (kaiserlich-königlich) 12. Feldjäger Bataillon* Sohn --- Dominik Wittek, --- von Gaya, und Mutter Elisabetha geboren ?Fernberch? --- von Gaya aus Mähren.)
The translation I received about the groom is:
Unterjäger at Imperial-Royal 12th Feldjäger Battalion, son of --- Dominik Wittek, --- from Kyjov, and mother Elisabetha born (?Fernberch?) --- from Kyjov in Moravia.
Would someone be able to tell me something about what he did and about the regiment. Johann died before 1879. Thank you for any information.