William and Mary had five children: Priscilla Cecilia (1870–1941) named after her aunt, married her first cousin, Lt. Col. Hugh Annesley, 5th Earl Annesley.
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Close relatives include his Aunt, Priscilla Cecilia, Countess of Annesley (wife of the 3rd Earl), his sister, also Priscilla Cecilia, Countess of Annesley (pronounced "Anzlee"), wife of Hugh Annesley, 5th Earl Annesley.
One of her daughters, Priscilla Armytage-Moore, became Priscilla, Countess of Annesley (see Hugh Annesley, 5th Earl Annesley).
Hugh Annesley, 5th Earl Annesley (1831–1908), British Army officer and Member of Parliament
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