What is "kesiraja"

Kēśirāja, also spelled Keshiraja , was a 13th-century Kannada grammarian, poet and writer. He is particularly known for authoring Shabdamanidarpana, an authoritative work on Kannada grammar. According to Dravidian scholar Sheldon Pollock, because of this work he is considered the "greatest theorist of Kannada grammar". He was also a scholar in Sanskrit as well and a court poet (Aasthaana kavi) in the Hoysala Court.