--There is an 1887 Family List - Josvainiai/Kaunas/Kaunas -- --
[Page 63 – Registration # 177 -- former Reg # 75/770 ] for: VOLFBERG Abram Itsko -- (father = Leyba) -- Head -- age this: 40; 20 in 1866 -- Yes, this is Josvainiai, and father is Leyba - but does not necessarily mean it is Leyba Volfberg -- 1874, 1887 Lists suggest this Leyba born abt 1835/1836, and Abram itsko is 40 in 1887 => b abt 1847 - so suggests when Leyba was about 11 or 12.
--1874 Additional Revision Lists [Oshmiany/ Oshmiany / Vilnius] have ZYSKAND - VOLBERG Leiba -- father=Leizer -- Head with son Movsha age this: 22 - so born c 1852 -- Abram Itzyk is 40 in 1887 so born c 1847 - so would fit well with this family. Also, his former Reg. is 75/770 - NOT 42 for first one, as is true for all the rest of Charles / Tsalko Wolfberg's clan. -- Does not mean Abram Itsko goes to the family with Leizer as g'father - does definitely demonstrate was more than one possibility at the time for "Leyba Volfberg" [there is also FOLFBERG Leyba - father=Mikhel on 1866 Additional Revision List for Luoke/Siauliai/ Kaunas - and likely others]
--Military List - Date: December 1868 -- Josvainiai / Kaunas / Kaunas [Page26 - Reg.: 91 - Former Reg: 75 ] -- has WOLFBERG Abram Itsik -- father: Leyb --- age this: 23; age last 21 -- Comments: "included in 1866" -- this is within a year of age on 1887 List, so probably same person - again, not correct Reg.#s for rest of Charles / Tsalko Wolfberg's clan.