He's maybe our great great great uncle Johann, 4X removed...

 I bought sweet potatoes today, and while they're cooking, I have time to show you another relative in the church record books from Bohemia!  I've never made anything with sweet potatoes before, but found lots of recipes online.  'Course, that's where we've found these books, too.  (Clever segue!)  
If you're new here and want to check em out, there's a link on the left sidebar--scroll down and click "Czech Church Books".
I've begun looking at the books again because of our new English relative, Su.  They're still fascinating, and we realize we can still "read" the script there.  YAY!

 Now, WHO is this person, and how does he fit?  Well, remember Paul Hesch's parents--Johann Hesch married a woman named Marya Schlinz, and this is a Schlinz birth (4th one down). However, this page records births in September 1874, in particular, the grandson of Mathias Schlinz.  I'll translate this on the fly--these are the parents of baby Johann, born male, Catholic and legitimate on the 21st of September 1874:

"Martin Schlinz, citizen, from Niedermuhl, son of deceased Mathias Schlinz, citizen of Lasinice, and his wife Agnes, daughter of Mathias Novak, citizen of Lasinice"
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Maria, daughter of Maria, daughter of Wenzel Glaser, citizen of Obermuhl #22, and his wife Maria, daughter of Thomas Prinz, ____ ____ ___ ___"

 Note that by 1874, handwriting was transitioning into words and letters that we can recognize easier, since it's more recent.  Still, I can't read the last few words about Thomas Prinz....its maybe that he was from (Deutsch) Maliken.  Also, the little + indicated Mathias Schlinz, Martin's dad, was deceased.
So, probably, Marya was a great-aunt to little Johann.  Too bad he never met her.  But look, this may be where the name MATHIAS came from in the Hesch family.  Marya father was Lawrenz, but her son was Mathias...maybe after grandpa?