Marianne Muis (born 28 July 1968 in Amsterdam) is a female former medley and freestyle swimmer from the Netherlands. Swimming career Muis competed in three consecutive Summer Olympics for her native country, starting in 1988. There she won the silver medal with the Dutch women's 4×100 m freestyle relay team, behind East Germany. Her twin sister and three-time Olympian Mildred was on the same silver winning team. Despite being of Dutch nationality she won the 200 metres medley title in 1988 at the ASA National British Championships. References External links 1968 births Living people Olympic swimmers of the Netherlands Dutch female medley swimmers Swimmers at the 1988 Summer Olympics Swimmers at the 1992 Summer Olympics Swimmers at the 1996 Summer Olympics Olympic silver medalists for the Netherlands Dutch twins Swimmers from Amsterdam Dutch female freestyle swimmers World Aquatics Championships medalists in swimming Twin sportspeople European Aquatics Championships medalists in swimming Medalists at the 1988 Summer Olympics Olympic silver medalists in swimming Universiade medalists in swimming Universiade silver medalists for the Netherlands Universiade bronze medalists for the Netherlands Medalists at the 1987 Summer Universiade Medalists at the 1995 Summer Universiade 20th-century Dutch women