Marius (June 7, 1854 – November 8, 1919) was a Dutch writer and painter.

Marius was born in Hengelo but was trained under Jan Striening (1827-1903) in Deventer.

[1] She then moved to Amsterdam where she trained under August Allebé.

[1] In 1883 she settled in the Hague, where she became an art critic as well as continuing to draw and paint as a member of Pulchri Studio.

She lived with her brother's family, and after he died in 1903 she stayed in the house with his surviving family and earned a living with her books, which were well received.