Cedargaunt was an ancient treant. In the adventure hook Seed of Life in the Critical Role: Tal'Dorei Campaign Setting, set in 812 PD, he was deceased; his last bloom, the Seed of Life, was being used as decoration around the neck of a pet remorhaz of an unidentified frost giant jarl.[1]
So far, Cedargaunt has not appeared or been mentioned onstream.