Denis Percy Arnold Walker (2 December 1947 – 4 December 2017), also known as Bejam Kunmunara Jarlow Nunukel Kabool, was an Australian activist. He was the son of poet Oodgeroo Noonuccal (Kath Walker) from Minjerribah (Stradbroke Island, Southern Queensland) and Bruce Walker. He had a younger brother, Vivian. Denis Walker was a major figure in the civil rights and land rights movements of the 1970s and continued to fight for a treaty between the Federal Australian government and Aboriginal nation groups through the 1990s and until his passing in 2017.