of Streatlam Castle was educated at Trinity College, Cambridge.
Sir William married Elizabeth Blakiston of Gibside on 17 August 1691.
From this marriage came much of the wealth of the Bowes (later Bowes-Lyon) family as the Gibside estates lay over rich coal seams.
George's daughter (Sir William's granddaughter) was Mary Eleanor Bowes (1745–1800) – in her day considered to be the "wealthiest woman in Europe".
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