I believe he was born village south of Lublin, near Frampol.
Surname: Dyjach
Since records are at the town level (both religious & civil), you need the exact town name & if possible the province.
606 listings in a 1998 Directory of Polish names. Abbreviations are for the old province name.
Nazwisko Ogólna liczba Rozmieszczenie
Dyjach 606 BB:7, By:14, Ch:9, Ci:1, Cz:1, El:4, Gd:8, JG:5, Ka:12, Ki:3, Ko:4, Kr:16, Ks:4, Lg:2, Ls:9, Lu:33, Ol:5, Pt:4, Pł:3, Pr:2, Sr:4, Su:9, Sz:11, Tb:295, To:12, Wr:6, Za:123
606 listings in a 1998 Directory of Polish names. Abbreviations are for the old province name.
Nazwisko Ogólna liczba Rozmieszczenie
Dyjach 606 BB:7, By:14, Ch:9, Ci:1, Cz:1, El:4, Gd:8, JG:5, Ka:12, Ki:3, Ko:4, Kr:16, Ks:4, Lg:2, Ls:9, Lu:33, Ol:5, Pt:4, Pł:3, Pr:2, Sr:4, Su:9, Sz:11, Tb:295, To:12, Wr:6, Za:123
It is probably a dilaectic variant of dyjak, dejak, diak meaning a semianrian in a Ukrainian seminary.