accepted his son, Seyyed Jamal al-Din, to serve in the Persian army. He wrote these materials based on Saeid-Ali, but there wasn't such a sentence in Saeid-Ali. The historian Mammadova didn't think Seyyed Abbas could have lived that long. Elsewhere, Asadov wrote that Seyyed Abbas' rule of the Talish Khanate did not last long, he died in 1749. If he died in 1749 (according to The Chronicle, his reign lasted 20 years), then he should have come to power in 1729. At that time, Nader was not Shah of Persia. On the other hand, Russian archival documents shows that Mir Abbas Beg was captured and beheaded by the Ottomans in 1726. Asadov wrote that Nader Shah ordered Seyyed Abbas to come to power in Talish. However, he does not say where he got it from. This would not be possible. Because, first of all, the archival documents says that he had killed. The second, is that in the Saeid-Ali's book, when Nader proclaimed himself as Shah, he wrote that Mir Abbas was no longer alive. The contradictions between The Chronicle and The Jewel Book of Lankaran are obvious and far from reality. Mammadova believed that it would be right to prefer Saeid-Ali, because he approached the events from Mirza Ahmad's historical point of view, used the historical sources of his time and in some cases expressed a critical attitude. The author indicates the exact date of the decree, thus it can be assumed that he saw the decree. The Chronicle attributed this event to the period of Nader's rule and described that he turned from a poor man to the level of Lankaran's ruler. According to Mammadova, This is not convincing because it is incompatible with historical events. Seyyed Abbas is not mentioned in the works of Russian and foreign travelers who visited these areas, only Musa Khan is mentioned a lot. It should be concluded that there were two person with the name of "Abbas". The first was Seyyed Abbas, who founded the dynasty of Khans of Lankaran. The second was Mir Abbas or Abbas-Qoli Khan, who became a Khan in the early 18th century and was killed by the Ottomans in 1726. This is confirmed by other facts. An archival document mentions Mir Aziz Khan as brother of Mir Abbas Beg. Elsewhere, Mir Abbas Beg offers to entrust either his brother or his son to Russia to show