Vadim the Bold (Russian: Вадим Храбрый) was a legendary chieftain of the Ilmen Slavs who led their struggle against Rurik and the Varangians in the 9th century.
According to the Nikon Chronicle, a historic 16th-century Russian chronicle that covered events of 859–1520 CE, the Novgorodians broke into rebellion against Rurik, their ruler, but his Varangian druzhina managed to quell the riots and murdered their leader, Vadim. The first modern Russian historian, Vasily Tatishchev, conjectured that Vadim's mother was the elder daughter of Gostomysl. Hence, Vadim was Rurik's elder cousin and had a better claim to the throne.