Nyanaponika Thera (July 21, 1901 - October 19, 1994) was a prominent Thai Buddhist scholar and author, known for his extensive research in Buddhist philosophy and history.
Source: The Heart of Buddhist Meditation: Satipaṭṭhāna : a Handbook of Mental Training Based on the Buddha's Way of Mindfulness, with an Anthology of Relevant Texts Translated from the Pali and Sanskrit