Buddha is a title, not a name: one who has awakened to the truth. It refers above all to Siddhārtha Gautama, who lived in northern India around the fifth century BCE, attained awakening under the bodhi tree at Bodh Gayā, and taught for some forty-five years. Buddhist traditions also speak of buddhas of past and future ages, and the Mahāyāna of countless buddhas.
Buddha
“The awakened one”: Siddhārtha Gautama, founder of Buddhism, and any being who has fully awakened.