Jean Harold (Harald) Edward de Saint Cyr (April 9, 1875 – November 3, 1966) was the alias of John (Jack) Henry Edward Thompson of Waco, Texas.
He was a fortune-hunting playboy who married three older wealthy widows.
The first two died while still married to him, each leaving him a sizeable inheritance.
His third wife divorced him after less than a year of marriage.
The Eugene J.
de Sabla, Jr., Teahouse and Tea Garden that is currently on the National Register of Historic Places for San Mateo County, California was part of his estate.