Grandson of Echo Hawk (Son of Elmer Echo Hawk and Alice Jake) –No Descendants– Biographical Notes “BRUMMETT ECHOHAWK; PAWNEE THUNDERBIRD AND ARTIST” -by Kristin Youngbull, 08/2015. Brummett was one of nine Pawnee code talkers in WWII. Download PDF of Kristin Youngbull’s dissertation, “Brummett Echohawk: Chaticks-si-chaticks” 08/2012. Obituary, Tulsa World.