Sir William Grierson, 9th of Lag (died 1629) (1567–1629) Parents Helen Douglas Roger Grierson, 8th of Lag Children Agnes Grierson Isabel Grierson Sir James Grierson Sara Grierson Alexander Grierson Helena Grierson John Grierson Lancelot Grierson Sir Robert Grierson of Lag Siblings Grisel Grierson Agnes Grierson unknown daughter Grierson Susanna Grierson Partners Nicola Maxwell