I just found Fred Plutchak in the 1930 census in Butler Co., PA with Eunie "June" Carter and two children who appear to be Frederick W listedas William age 16 in 1930 and Alain age 18 in 1930, who was probably Evelyn in 1920.I looked up June's sister and found Fred next door.He isn't in the census index so I couldn't find him before. Therefore he didn't die before 1930.
1930 Butler County Adams Twp. 280 292 Frederick Plutchak head Rents $10 50 Married 33yrs Mich Ger Ger Farmer June wife 38 Married 21 Kentucky Kent Kent Alain daughter 18 Single SD Kent Mich William son 16 Single SD Kent Mich (Alain is also listed as Evelyn in 1920 census and William is listed as Frederick W in 1920 census and 1920 census says their mother was born in Michigan not Kentucky)
Could it have been that Joseph and Helen Mary didn't want to live in Butler Co., PA with Fred and June and that's why they were living with Robert?
My cousin told me that thier (Joseph and Helen Mary) step-mother wasn't that nice to them (according to my cousin's father).