William Quan Judge (April 13, 1851 March 21, 1896) was a mystic, esotericist, and occultist, and one of the founders of the original Theosophical Society. He was born in Dublin, Ireland. When he was 13 years old, his family emigrated to the United States. He became a naturalized citizen of the USA at age 21 and passed the New York state bar exam, specializing in commercial law.