Hi Kristina,

You have some very helpful records there. I would suggest getting the death records for both Gustaf and his wife. You can order these certificates from the NYC Municipal Archives. http://www.nyc.gov/html/records/html/archives/death.shtml.

Or perhaps another poster here can do a look-up for you.

Death records should have the deceased's parents' names...if the informant knew them.

Or you can possibly order the Family History Library film numbers (noted at the bottom of the citations you have) and view the certificates at your LDS Family History Center.
https://familysearch.org/learn/wiki/en/Category:Sweden_Famil...

As for Calvary, you can call them (Queens, New York, 718-786-8000) and ask for the burial locations for these people (make one call for each person). That will confirm the burial location. Calvary, a Catholic cemetery, charges a minimum fee of $90 for an interment list which would give you complete information.
http://www.calvarycemeteryqueens.com/

Good Luck!