Find Ancestors

After a great success story for myself - finding my dad after 35 years thanks to genes reunited I have been given information that my half brother and sisters whos father died many years ago may of had a brother. My half brother/sisters names were Christian and Wendy, they were both born outside of the UK, Germany and Holland I think as their father was in the army. Their fathers name was James Halliday and his family originated from Scotland. James was married to my Mother Bunty Forster. James died in a car accident at a young age, I believe he was possibly in his twenties. Any information anyone has on this family line would be gratefully received I have only started to research it today so may have further information to add as time goes on............ ........I have found some old paper work which has given me the following information James (Jim) had two brother and one sister they were Robert John (known as Jack) and Marion who married Keith Fovargue They lived in Bonnybridge near Falkirk The family onced lived in Edendarroch Cottage in Tarbet Dunbartonshire There were two other children called Robin and Heather who both died, Heather i knew died in May 1964 but am not sure when Robin died Many thanks Heather