Thanks for taking time to help and providing some information...
I should add my best stepping off point was the 1860 census
https://www.familysearch.org/ark:/61903/3:1:33SQ-GBSC-R1J?i=117&cc=1473181where it listed...
Bernard (35), Mary McKinney(37) and Sarah(1) all listed as born Ireland
Charles (26) & Margaret Devlin (23)
James Faulkner (29) born Ireland
Jetty (Bridget) (20) born Ireland
Jetty (Bridget) (7) born Ireland
I suspect the McKinney's are related, but could not find them in other records - suspect typo in name when recorded in 1860
James I also assume is a relation but could not find him for sure in later records
I had thought perhaps I could find James and/or Bernard in Civil war muster roles - although there were several hits I could not link any for sure although this one was a possible:
Name: James Faulkner, Enlistment Date: Mar 1861, Enlistment Place: Philadelphia, Age: 28, Birth Year: 1833, Birth Place: Londonderry, Ireland
----
(Note - There is also a John Bruce Faulkner (abt. 1830) who is somehow related - he emigrated to Chicago but is more elusive than the Philadelphia Faulkners.)
----
Now to answer your questions...
1. Did any of the other girls, besides Bridget born 1853, marry?
- Margaret (b 1851) was not found on the 1860 census - searched for death records - none found
- Margaret (b 1837) married in St Pauls in Philadelphia on 14 Sept 1857 to a Charles Devlin but the city of Philadelphia had no record of her marriage. There was a witness, James Faulkner (No parents listed)
- Could not find Bridget (b 1841) on later census - assumed she married.
- Bridget (b 1853) married W Connacher St Philip Neri 30 Nov 1871 - no parents listed
2. Other than Bridget where and when did they die?
- Margaret died in NYC in May 24, 1897 and her death certificate (#8117) only listed Ireland as place of birth for her and her parents but no names were listed.