Who gave title narendrana to vivekananda?

The title "Narendrana" was given to Swami Vivekananda by his guru, Sri Ramakrishna Paramahamsa. The name is derived from Vivekananda's birth name, Narendranath Datta, with "Narendrana" signifying a special bond between the teacher and disciple. This title reflects the spiritual connection and the guidance that Sri Ramakrishna provided to Vivekananda on his path to enlightenment and self-realization.