Krain was the Austrian name for the province that became Slovenia
Maria was NOT living at Neumuhl, Germany according to the manifest it was Austria.I would believe this was somewhere in the Litija municipality.This was a town plus this town is a municipal center for numerous smaller villages.... and in those days if you look at the 1910 Austrian Military map you will see many Austrian (German) placenames.Slovenia was heavily influenced by centuries of Austrian rule.
So how were is Neumuhl, Austria or rather where was this place in what is now Slovenia.... Neu = New, muhl = mill Slovenian direct translation would be Nova Mlin
Janus?The name would more likley be the common male name Janez.
I notice the 1920 census lists all 3 as NAturalized 1915, which means that once John was Naturalized both wife and foreign born John Jr recieved derivative Citizenship.Those papers will show where John was born.
Interesting I find no records for the surname POTCHNIK.... but look at this interesting KS census record from 1905.... note Ignac (which is the Slovene spelling for Ignatz) but more interesting look at the name OPLOTNIK...
Name Age Lucas Oplotnik 37 Johanno Oplotnik 28 Nandi Oplotnik 7 John Oplotnik 6 Matildo Oplotnik 5 Willie Oplotnik 1 Matt Oplotnik 40 Ignac Slugo 38 Toney Briski 28 John Mitchel 20 Martin Erznoznik 26
Searcing for arrivals from Littai (Austrian/German spelling for Litija surname beginning with P finds
I would post to the Ancestry Slovenia board (for which NO subscription is needed) perhaps you will find someone who is knowledgeable in Slovenian genealogy