What is "gajaga"

Gajaga, where Gaja is a Sanskrit word for elephant and whose earlier name was Gajankusha, was a very old Kannada author of 9th/10th century who has been mentioned in Shabdamanidarpana, a comprehensive and authoritative work on Kannada grammar authored by Kesiraja in 1260 CE, as a pathbreaking poet of the Rashtrakuta literature in the "Classical Age". Unfortunately no work by Gajaga has survived, but there are evidences that suggest that he wrote more than one book.