Principality of Polotsk
The indigenous Livonians ("Līvi"), who had been paying tribute to the East Slavic Principality of Polotsk, and were often under attack by their southern neighbours the Semigallians, at first considered the Low Germans (Saxons) to be useful allies. The first prominent Livonian to be converted was their leader Caupo of Turaida, who was baptized around 1189.