Bhaktivinoda Thakur, born Kedarnath Datta, was a Hindu philosopher, guru and spiritual reformer of Gaudiya Vaishnavism who effected its resurgence in India in late 19th and early 20th century and was hailed by contemporary scholars as the most influential Gaudiya Vaishnava leader of his time. He is also credited, along with his son Bhaktisiddhanta Sarasvati, with pioneering the propagation of Gaudiya Vaishnavism in the West and its eventual global spread.