Luang Pho Waen Sujinno (Thai: หลวงปู่แหวน สุจิณโณ, RTGS: Luang Pu Waen Su-Chin-No, also Phra Ajahn Waen Sujinno, popularly known as Luang Pho Waen meaning Venerable Grandfather; 16 February 1887 – 2 July 1985) is one of the longest living students of Phra Ajahn Mun Bhuridatta and was a very popular monk in Thailand. Luang Pho Waen Sujinno was also featured in the Asia Magazine.