I am sure that you are aware that this George Courtauld was the founder of a Silk factory in Halstead Essex and with sons Samuel and George,founded a dynasty which eventually became the synthetics company Courtaulds. I am almost certain that a descendant,Samuel,founded the Courtauld Institute Art Gallery in London. George returned to America and died there. The family appear to have descended from French Hugenot Silversmiths who settled in London. Augustine seems to be the first recorded. I would be very interested to know from which of George's many children you have descended.