Alexander Forbes (1788-1843) (1788–1843) Parents Katherine Ann Fraser Duncan Forbes-Mitchell of Thainstone Children William Forbes Margaret Forbes Janet Sempill Forbes Rachel Forbes Duncan Forbes Katherine Anne Forbes Sarah Forbes Siblings unknown daughter Forbes-Mitchell unknown daughter Forbes-Mitchell Henry David Forbes-Mitchell of Balgownie Duncan Forbes-Mitchell of Thainstone John Forbes-Mitchell of Thainstone Mansfield Forbes-Mitchell Arthur Andrew Forbes-Mitchell of Thainstone William Forbes-Mitchell of Thainstone Partners Janet Forbes