The Ioakim chronicle confirms that Rurik and his two brothers were Slavs and grandsons of the previous Russian Grand Duke of Novgorod Gostomysl (in the "Tale of Bygone Years" Gostomysl is not mentioned). Excerpts from it were presented by the historian Tatishchev in 1748 according to the manuscript of Joachim, the first bishop of Novgorod, appointed after the baptism of Russia. He died in 1030. Scientists have long been skeptical of the Ioakimov Chronicle as of an invention of Tatishchev, since its original was lost.
But suddenly several facts from this chronicle were confirmed by archaeological excavations. In addition, Gostomysl was found recorded by the first prince in two Novgorod chronicles. Moreover, a certain Prince Gostomysl is also mentioned in Western chronicles. This was the name of the leader of the West Slavic tribe of the Veneds, who, according to some sources, died in 844 in a battle against King Louis II of Germany, and according to others, was able to escape to Novgorod, where he was "seated" (chosen) to reign. Today, historians no longer consider it "bad form" to refer to the Joachim Chronicle, but with reservations such as "perhaps" and "probably".
The "Legend of Slovene and Rus" by an unknown author also echoes the Joachim Chronicle, which some historians consider to be rather a recorded legend than a real story. According to these two works, the state of Russia was founded by the sons of Prince Scythian. The brothers Sloven and Rus came to Lake Ilmen and built two cities there: the first – the "great city" Slovensk in 2409 BC (later renamed to Veliky Novgorod, as some believe), the second – the city of Rus (now Staraya Russa, meaning “Old Rus”). From Sloven power passed to one of his sons, Vandal. It was he who actually created the so-called Russian Kaganate, "having conquered many lands and peoples on the coast of the sea." When Prince Burevoy, the grandson of a Vandal, ruled the state, the overseas invaders—Varangians (Vikings) coveted the wealth of the lands under his control. The prince resisted the invasion, but was defeated near the Kumeni River (now Kyumijoki, Finland) and with the rest of the squad took refuge in the city of Byarmy where he died soon after. The Varangians imposed heavy tribute on the conquered lands.
But Burevoy’s son Gostomysl (“seated” on the throne in Novgorod) came to his father's aid. He managed to gather a strong army, expel the Varangians , stop paying tribute and re-unite the peoples into a single state. Gostomysl made peace deal with the Varangians (Vikings), and since then "there has been silence all over these lands."