Re: Prunty's in longford or US
There is another Prunty family which has so many similarities I wonder if it could be connected to you. Namely, the daughter Margaret looks like your Margaret except the birthdates are slightly off. I looked through all the immigrations and nothing else was even close. While they didn't immigrate in 1925 (I didn't find anyone with the date you cited), they did go back and forth a couple of times. Otherwise the rest fits (sister Marion, brother patrick)
Prunty, Peter, Head,Male,White,24,1886,Married,England Ireland,Ireland,1890
Prunty, Mary Wife Female White 24, 1886, Married,New York,Scotland,New York
Prunty, Margaret,Daughter,Female,White 3,1907 Single New York,England,New York
Prunty, Marion Daughter Female White 2 1908 Single New York England,New York
Prunty Jr. Peter Son Male White 2/12 abt 1910 Single New York England New York add
Peter prunty, married, naturalized in 1912, living at 560 W 46th street, NYC
Marion prunty, f,11
peter prunty, 11, 610 W 46th street
born jan 19, 1910 in New York
june 29, 1922
610 W 46th street
Margaret (born in US)
I'm researching Ann Prunty (b.1835) parents John Prunty and Bridget Reynolds from drumlish in Longford Co, Ireland but haven't made any other Prunty connections yet.
Hope this is helpful.