Here are my Jamaican forefathers. I see we have a lot of names in common.
Joseph Alexander married Catherine Kate Elken, in 1831 they had Thaddeus Joseph Alexander. He married Sarah DeCosta, and they had Mortimer Joseph Alexander. He married Eva DeSouza ( but must have also married Clementine Roch, who was the mother of Katherine (Kate) ELKEN Alexander. So Moms Grandmother was named after HER Grandmother. This has to be the correct family tree.