Luang Por Ajahn Sumedho (born Robert Jackman, July 27, 1934, Seattle) is the most senior representative of the Thai Forest Tradition of Theravada Buddhism in the West. The word "Ajahn" is not a proper name, but a title which means "Teacher" in Thai. He is also affectionately known among his students as "หลวงพ่อ" (Luang Por) which means "Venerable Father" in Thai. He has been an ordained bhikkhu for 40 years and a seminal figure in the transmission of the Buddha-Dhamma to the West. He is currently the abbot of Amaravati Buddhist Monastery in the United Kingdom.