From the Telegraph of 19 February 2018: MACKESON-SANDBACH Rosemary Daphne, died peacefully aged 84. Sister of Auriol and loving aunt of six nieces and one nephew. Funeral private.
She was d of Capt Graham Lawrie MACKESON-SANDBACH (1907-84), scion of the gentry family of that name of Hafodunos, and Geraldine Pamela Violet (1909-2001) d of Maj-Gen Arthur Edmund SANDBACH (1859-1929), also of Hafodunos, and Hon Ina DOUGLAS-PENNANT (c1868-1942, d of 2nd Baron PENRHYN).
Her sister Auriol Veronica was the 3rd wife (m 1997 div 2007) of the present (4th) Marquess of LINLITHGOW (b 1946) but had no issue from the marriage.