When Sri Caitanya Mahaprabhu appeared about 520 years ago, the Holy Name also appeared with Him. Previously the Holy Name was hidden in the Vedas. Mahaprabhu has appeared along with His topmost devotee in one form.
Gadadhara Pandita was born on Amavasya (the dark moon night). He represents the most submissive aspect of Srimati Radharani. Those with the divine eye consider Gadadhara Pandita to be the topmost devotee of Sri Caitanya Mahaprabhu.