"William Griffith Hahn - son of David Hahn & Maria Yrastorza, after World War II was contracted by Kodak to take pictures of the destruction of the Philippines, for the U. S. Navy."
Once lived in Baguio, Philippines. Also referenced as the superintendent of Diklom Ranch in Bukidnon, Philippines. Later noted to be living in Seattle, Washington.
"Hahn & Yrastorza Union," Genealogy.com. Movie Makers, Sept. 1936, 394. Movie Makers, May 1942, 218. American Cinematographer, May 1952, 210.