Zij is getrouwd met William Keith-Falconer, 8th Lord Falconer of Halkerton.
Zij zijn getrouwd op 18 juni 1793 te Aberdeen, Scotland, zij was toen 22 jaar oud.
Kind(eren):
dau of Sir Alexander Bannerman, Bart of Kirkhill. From 18 June 1793, her married name became Keith-Falconer. As a result of her marriage, Maria Bannerman was styled as Countess of Kintore on 30 August 1804.
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