NEINKEN parents (Lipmann & Sara) and children (who identified their birthplace as Riga) emigrated to U.S. about 1893. Although there are possible records of this family in Lithuania, I find no other evidence of the NEINKEN name anyplace. Where is the rest of the family--under other names or countries?
There were Nankin families from Birzai Lithuania who emigrated to South Africa and lived in Durban. I have ancestors from Birzai who went to Riga. Some of their descendants also emigrated to South Africa.
I suggest you search JOWBR which is the Jewishgen Online World Burial Registry. There are many Nankins in USA, 36 in South Africa, 7 in Australia.and 24 in Canada.