Margaretha Henrica Gerardus Maria Heijmans (29 October 1932 – 27 July 2023) was a Dutch writer and illustrator of children's literature.

After attending a gymnasium Heymans studied for two years at the School voor Kunst en Kunstnijverheid in 's-Hertogenbosch.

[4] Heymans received the Gouden Penseel award for her illustrations in Annetje Lie in het holst van de nacht and Heymans stated in 2013 that she considers this book to be the most beautiful story by another author that she has ever illustrated.

[4] Dros received a Zilveren Griffel award and the very first Woutertje Pieterse Prijs for this book.

[4] Heymans lectured in illustration at the Koninklijke Academie voor Kunst en Vormgeving from 1972 till 1993.