David Riess Macdowall, 12th of Castlesemple (born 1953) (b. 1953) Parents Fergus Day Hort Macdowall, 27th of Garthland Traszha Ilse Riess Children John Alexander Dougal Macdowall Elliott Riess Macdowall Garnett Lloyd Hill Macdowall Siblings Traszha Roxanne Macdowall William Fergus Victor Macdowall, younger of Garthland Partners Sharon Hill