Most Ven. Ambagahawatte Indrasabhawara Gnanasami Maha Thera (; legal name: Cornelis Madanayake) was the founder of Sri Lanka Ramanna Nikaya and Sri Dharmagupta Pirivena of Mà «la Maha Viharaya, Payagala, Kalutara. He was the first Maha Nayaka Thera of Sri Lanka Ramanna Nikaya.