Radonja () is a masculine Serbian given name. It is derived from the adjective rad which means 'willing', 'eager', 'keen'. Patronymic surname RadonjiÃÂ or RadonÃÂiÃÂ/RadonjiÃÂiÃÂ is derived from Radonja.
In the 1455 survey of the BrankoviÃÂ district on Metohija and Kosovo there were 212 men whose name was Radonja.