(9 June 1864 - 16 February 1925) was a Dutch painter, water-colourist, illustrator and printmaker. He is considered a representative of the younger generation of the Hague School.
Arntzenius was born in Surabaya on the island of Java where his father served in the Royal Dutch East Indies Army. In 1875, at the age of 11, he was sent to the Netherlands to Amsterdam to live with his aunt and uncle in order to complete his education.
In 1882 he became a student of Frederik Nachtweh, under Nachtweh's supervision he gained admission to the Rijksacademie van Beeldende Kunsten. During his time at the Rijksacademie, from 1883 to 1888, his teachers included August Allebe and Barend Wijnveld, and amongst his fellow students were Isaac Israëls, George Breitner, Willem Witsen and Jan Veth. After his studies in Amsterdam he spent another two years at the Koninklijke Academie voor Schone Kunsten in Antwerp, studying under Charles Verlat.
Back in Amsterdam, Arntzenuis became a member of the artist's societies Arte et Amicitiae (1890) and St. Lucas (1891), and he had a studio at the Sarphatistraat. In 1892 his mother became widowed and moved to The Hague and Arntzenuis also moved there to keep her company. Around the same time his former fellow students Isaac Israëls and George Breitner left The Hague for Amsterdam to be a part of the capital's more vibrant artistic climate. At The Hague the established painters of the first generation of the Hague School dominated artistic life.
Spuistraat, 1919, Haags Historisch MuseumArntzenius became a member of the artist's society Pulchri Studio in The Hague in 1892. From 1893 to 1895 he shared Bernard Blommers' former studio with Cornelis Antonie van Waning. He also contributed illustrations to Elsevier Geïllustreerd Maandschrift from 1892 to 1894. In 1896 he was admitted to the Hollandsche Teeken Maatschappij, a society that promoted the medium of watercolours among its members. He got married in 1900, to Lide Doorman, a talented painter of floral still lives, who lived in the house opposite of Arntzenius' mother, together they had four daughters, who he frequently painted.