*  For Gustav, a probable fit with a pedigree chart except the birth year is wrong on one of them is this Theory.  A connection to the Gravesite (Tombstone) database is here.

Map of addresses for Kobersteins in the 1920 cencus in Buffalo, Eggertsville, and Brooklyn.  It is of interest that the Buffalo and Brooklyn Kobersteins live close together as you would expect for a family.  Of course there is only one family in Eggertsville but they are relatively close to the Buffalo Kobersteins.

Roberstein

Name	Age	Estimated birth year	Birthplace	Race	Home in 1920	Roll	Page	ED	Image
Edward Roberstein	68	1851	Bohemia	White	Bronx, Bronx, New York	T625_1130	21A	49	0863
Bertha	50	1870	Hungry	"	"	"	"	"	"
Albert	18	1902	New York	"	"	"	"	"	"
Alfred	17	1903	New York	"	"	"	"	"	"
Leo	15	1905	New York	"	"	"	"	"	"
Max Magdoff	30	1890	Russia	"	Bronx, Bronx, New York	T625_1129	10B	23	1026
Lina (wife) nee Roberstein	30	1890	Russia	"	"	"	"	"	"
Harry (son)	6	1914	New York	"	"	"	"	"	"
Samuel (son)	4	1916	New York	"	"	"	"	"	"
Joseph Roberstein (Brother in Law)	25	1894	Russia;Poland	White	"	"	"	"	"
Millie Roberstein	19	1900	Ohio	White	Minisink, Orange, New York	T625_1252	3B	127	0564

Koberston in 1920 Census

Name	Age:	Relationship	Estimated birth year:	Birthplace:	Race:	Home in 1920:	Roll:	Page:	ED:	Image:
Grenies, Luke	34	Head	Abt 1886	New York	White	Queens, Queens, New York	T625_1236	1B	376	0048
Grenies, Josephine	32	Wife	Abt 1888	New York	"	"	"	"	"	"
Grenies, Josephine	5 8/12	Daugher	Abt 1915	New York	"	"	"	"	"	"
Grenies, Gertrude	3 1/12	Daugher	Abt 1817	New York	"	"	"	"	"	"
Kenny, George	27	Son-in-Law	Abt 1893	New York	"	"	"	"	"	"
Kenny, Mary	27	Daugher-in-Law	Abt 1893	New York	"	"	"	"	"	"
Kenny, George	6	Nephew	Abt 1914	New York	"	"	"	"	"	"
Koberston, Charles	31	Son-in-Law	Abt 1888	New York	"	"	"	"	"	"