Simon II (Georgian: სიმონ II), also known as Svimon or Semayun Khan (born c. early 1610s – died 1630), was a Persian-appointed king (actually, khan) of Kartli, eastern Georgia, from 1619 to 1630/1631.
A son of Bagrat Khan, Simon was a Georgian convert to Islam. He was brought up Muslim in Isfahan, Persia.
On the death of his father in 1619, Simon, still in his minority, was installed by Shah Abbas I as a khan of Kartli. A Georgian noble, also a convert, Giorgi Saakadze, was appointed as a vekil (regent) and vizier to him. Largely unpopular with his Christian subjects, Simon's "khanate" never stretched beyond the capital Tbilisi and the Lower Kartli province, where the districts of Somkhiti and Sabaratiano were occupied by Persian forces.
In March 1625, Saakadze sided with the opposition in Kartli and the neighbouring Kakheti. He led Georgian forces that destroyed a Persian army at the Battle of Martqopi. Simon and his Persians fled from Tbilisi to the fortress of Aghjakala in Lower Kartli: the rebels gave Kartli to king Teimuraz I of Kakheti. On July 1 of 1625, the Persians defeated the Georgians at the Battle of Marabda. A Persian general, Isa Khan, reinstated Simon in Tbilisi, but significant parts of Kartli remained under the control of Teimuraz and Saakadze. Shah Abbas utilised the rivalry among the rebel leaders to divide them.