Ivar Axel Henrik Arosenius (8 October 1878, Gothenburg - 2 January 1909, Älvängen) was a Swedish painter and picture book illustrator.
He was, however, dissatisfied with the teaching methods there and switched to the Konstnärsförbundets skola ('Artists' Association School'), where he studied with Richard Bergh.
After a short time there, he found himself dissatisfied again and returned to the Valand Academy; taking part in an exhibition created by Carl Wilhelmson.
This was partly the result of his having been diagnosed with haemophilia by a doctor who recommended that he consume alcohol to improve his blood's ability to coagulate.
Later, he decided to move his family to Älvängen, where his mother-in-law owned a small property with a view of the Göta River.
In the late 1960s, after his widow was killed in an accident in France, his cabin was torn down and the doors (made familiar by one of his popular illustrations) were installed at the Parish Church in Starrkärr.
In 1978, his self-portrait was featured in a series of postage stamps which also included Karl Isakson and Carl Kylberg [sv].