It is not unusual for people to take an interest in genealogy and want to draw up their own family tree; in this case lengthy genealogical research is required. You might be able to find out more by looking into national archives and locating birth records, marriage records and death certificates. DNA testing can, to come extent, help you trace your family tree.
For more accurate genealogy pinpointing names on ancestors and mapping of family trees we would recommend seeking the services of a genealogist.