I am researching my friend's family tree. Her surname is CHERKAS. Her grandfather was Thomas Assinov Cherkas, who was born in Odessa, Ukraine in 1892. He came to the UK and lived in Wales, UK. He died on 26 November 1954. Everything stops with him on her family tree and I wondered if anyone here could point us in the right direction. My friend said he was Russian, so I assume that Ukraine was then Russian territory at the time of his birth. We have no idea of his history at all. I would really appreciate any help with this.