Westerngard was a member of the American Society of International Law, the American Bar Association, Massachusetts State Bar Association, Suffolk County Bar Association, Cambridge Historical Society, Cambridge Club, the Travellers and Harvard Clubs of Boston, and various Asian societies. Harvard University awarded him an honorary A.M. degree in 1903. The kingdom of Siam bestowed on him the title Phya Kalyana Maitri. From the Siamese government, he received the Grand Cordon of the
Order of the White Elephant, Grand Cross of the Crown of Siam, special second class
Order of Chula Chom Klao and second class Order of Ratanaphorn. The French government made him an officer of the
Legion of Honor. Denmark awarded him the Grand Cross of the
Order of the Danneborg. Considering the differences between teaching law and his work in diplomacy, Westengard could rightly boast that the latter afforded him considerably more honors, as he once wrote in a letter: I remember well that I dined one night with [Harvard University] President Eliot, when, pointing out the happiness of the law teacher's lot, he said that the practicing lawyer was a man "whose name was writ in water." No man should boast till he has safely finished his task; but, come what may, in Siam my name is writ more substantially on the land than that. == Personal affairs ==