Is this your PEJAKOVIC(H) family listed in 1930 US PA census at Seltzer City PA?
Name Age Nick Pejakovich 47 Anna Pejakovich 35 Samuel Pejakovich 18 Peter Pejakovich 17 Michael Pejakovich 5 John Pejakovich 3 7/12 Rose Pejakovich 2 6/12 Daniel Pejakovich 35
If so... Nick immigrated first and the family followed after the end of WW
Name: Pera (= Peter) PEJAKOVICH Age: 16 Name: Vasa (which is really Basil but no doubt became Samuel in the census) age 17 Arrival Date: 17 Sep 1928 Estimated birth year: abt 1912 Gender: Male Port of Departure: Trieste, Italy Ethnicity/Race/Nationality: Slovenian Ship Name: Saturnia Destination: to father Nick at Seltzer City PA Former residence Ljubotin, Yugoslavia... which is located in Croatia in an area inhabitedby many Serbs
The census states that Nick arrived in the US 1903 and Anna in 1923... the closest match found is
Name: Anka Pejakovic Arrival Date: 19 Feb 1921 Age: 27 Birth Date: abt 1894 Birth Country: Yugoslavia Former residence Petrinja (Croatia) Gender: Female Marital Status: widow Race: Croatian Ship Name: Canada Port of Arrival: Halifax, Nova Scotia, Canada Port of Departure: Liverpool, England Destination to mother Barica (=Barbara) DROVELICZ at Detriot MI