His father William Blaauw, of Queen Anne's Street,[1] was a Dutch immigrant, from a line of burgomasters of Amsterdam; William's second wife, Louisa Puller was daughter of Christopher Puller of Woodford, Essex.
[2][3] He was educated at Eton College and Christ Church, Oxford, where, taking a first class in classics, he graduated B.A.
He was the editor of the society's journal, Sussex Archaeological Collections, until 1856, when the eighth volume was issued; and was its honorary secretary until 1867.
[4] Blaauw contributed a sum of money to benefit the railroad business in Belton, South Carolina.
[3] She was daughter of John King who was Permanent Under-Secretary for the Home Department 1791-1806, son of the Very Rev.
Walker King, Bishop of Rochester; he was briefly a Member of Parliament in 1806-7 & Joint Secretary at the Treasury, and had married Harriot Margaret, daughter of Rt.
He then married Margaret Emily Gillman, daughter of Sir John St Leger Gillman, Baronet; they had two sons, Henry (who died unmarried) and Thomas (whose son Henry inherited Beechland; by the 1920s it was no longer owned by the family), and a daughter, Emily, who married a cousin of her father's first wife, Captain the Hon.