Eduardo Teixeira Coelho (3 January 1919 - 31 May 2005; Terceira island, Azores, Portugal)
Eduardo Teixeira Coelho was a Portuguese comic book artist and illustrator best known for his adventure series Ragnar le Viking. In some of his early work he used the pseudonym Martin Sievre.

Coelho's career began when he moved from The Azores to mainland Portugal. His most notable work there was for the magazine Mosquito, beginning in 1943. He moved to Brazil in the 1950s and taught at the Pan-American School of Art in São Paulo. In 1955 he moved to France and for the next several decades worked on a number of series, many of them for the magazine Vaillant, including Ragnar, as well as illustrating stories such as Tom Thumb and Puss in Boots for Playhour magazine.

Coelho died in Florence, Italy, aged 86, where he had lived for several years.