Theodorus van Hoytema, or Hoijtema (18 December 1863 — 28 August 1917) was a Dutch lithographer, illustrator and graphic designer, known for his book covers and calendars; especially those depicting birds.

He attended the Stedelijk Gymnasium Leiden and, together with two of his older brothers, passed an exam that enabled them to find work at a financial firm.

The following year, after the success of his first picture book about birds (Hoe de vogels aan een koning kwamen), he was married and moved to Loosduinen.

[2] That same year, he produced an illustrated edition of The Ugly Duckling by Hans Christian Andersen, followed by several more bird-themed picture books.

[2] He and his wife were the models for the main characters in Leo en Gerda (1911), a novel by Aegidius Willem Timmerman [nl] about the generation of artists who began their careers in the 1880s.