About Vulf Wolfson
[Recent] His grandson, born in 1826 was named Vulf. He was not on the 1837 list of emigrants from Courland to Kherson with his two sons. So he was dead by 1826.
His great grandson was born in 1849 and named Vulf, so he was dead before 1849. Since the great grandson had an older brother, Tuviya, born in 1843, it's possible that Vulf was still alive in 1843.
His son Iosel was born in 1803 so assume he was born circa 1783. So he would have been 60 in 1843.
Also, if he stayed in Courland and his son or sons emigrated to Novopoltavka in 1843, they may not have gotten news from Courland for several years.