About Chaim Unknown
He must have been a founder of Novopoltavka because his daughter lived there in 1858. He was dead by 1853 because she named her son after her father. So assume born in Courland and settled in Novopoltavka in 1841 with the founding families and died before 1853. We may be able to narrow him down by looking at the 1843 settlers' signatory list.