Myron Pivonka (P441) has provided these photographs of  Uncle John and family members.
 

JN Pivonka and sons - ca. 1940's

The four brothers, L to R.;  George (P46), Jack (P44), Uncle John, Johnny (P48), and Frank (P45).
 

JN Pivonka family members, ca. 1950's
From L. to R.; Johnny and his wife Billy (P48), Uncle Frank (P45), John N., Myron and wife Elizabeth (P441).