Margaretha Cornelia Galliard (25 November 1926 – 22 October 2019) was a Dutch swimmer who won a bronze medal in the 100 m backstroke at the 1950 European Aquatics Championships.

[1] She finished eighth in the same event at the 1948 Summer Olympics.

[2] She wins the 100 m backstroke at the Great Prize of the town of Paris in September 1950.

[3] After marriage, she changed her last name from Galliard to van Leersum.

This biographical article related to a Dutch swimmer is a stub.