Who married Mary Grey?

Sir George Grey, 1st Baronet, (10 October 1767 – 3 October 1828) was a British Royal Navy officer. He served as Master and Commander of the Mediterranean Fleet. He joined the Royal Navy at the age of 14 and was on active service from 1781 to 1804, serving in the American War of Independence, the French Revolutionary War and the Napoleonic War.

He served as Flag Captain for John Jervis, Earl of St Vincent and later as Flag Captain for King George III on his royal yacht. From 1804 to 1806, he was Commissioner at Sheerness Dockyard, and from 1806 until his death in 1828 he was Commissioner at Portsmouth Dockyard.