Complex sentence: In that period of history, and later, in the annals of Russian Circassians first appeared under the name (ethnonym) Kasogs, as for example Rededi Prince Kasozhsky was mentioned in "The Tale of Igor's Campaign".
Split into simpler sentences: In that period of history, Russian Circassians first appeared under the name (ethnonym) Kasogs. For example, Rededi Prince Kasozhsky was mentioned in "The Tale of Igor's Campaign".