Derek Kenyon Barker-Hahlo (born 1931) (b. 1931) Parents Ruth Stella Kenyon-Slaney John Francis Crofton Barker-Hahlo Children Robin Douglas Barker-Hahlo David Julian Neil Barker-Hahlo Kistie Isabelle Barker-Hahlo John William Barker-Hahlo Siblings Sir Brian Patrick McMahon, 8th Bt. Shaun Desmond McMahon Partners Teresa Clare Cunningham Wield