Answer
Rossif Sutherland has three brothers. His father, Donald Sutherland, had four children with his first wife, Lois Hardwick: Kiefer, Rachel, and twins Rossif and Angus. After his divorce from Hardwick, Donald married Francine Racette, with whom he had two more children: Roeg and John. Therefore, Rossif has three full brothers: Kiefer, Angus, and Roeg, and two half-brothers: Rachel and John.