What are the names of River Phoenix’s siblings? July 23, 2020 by Pamela Landy River Phoenix’s brother is named Leaf; his sisters are Summer, Rainbow, and Liberty. All are actors. Related Answers What was Montgomery Clift’s first movie? Were red M&M’s ever made with a carcinogenic dye? How many deceased inhabitants of Spoon River recite their verse epitaphs in Edgar Lee Masters’s Spoon River Anthology (1915)? Which Jackson siblings appeared on the variety series “The Jacksons” (CBS, 1976-77)? What is the brand that Tom Dunson (John Wayne) draws at the end of Red River (1948)? What route did Europeans first take to get to the Mississippi River?