Amadeu is a name that can refer to various individuals, but it is most commonly associated with Amadeu de Souza Cardoso, a Portuguese painter known for his contributions to modern art in the early 20th century. His work often features vibrant colors and innovative techniques, reflecting influences from Cubism and Fauvism. In literature, "Amadeu" may also refer to characters in various stories, such as in The Book of Disquiet by Fernando Pessoa. This character often embodies themes of introspection and existential reflection, showcasing the complexity of human emotions and thoughts.