Howard Charles Cannon III, or "Twilly" Cannon (d. March 29, 2016) was an environmental and social justice activist. With Mike Roselle, he co-founded the Ruckus Society, a nonprofit organization that sponsors skill-sharing and non-violent direct action training, strategy & consultation for activists and organizers from frontline and impacted communities working on social justice, human rights, migrant rights, workers rights and environmental justice.