Guillaume le Barrois d'Orgeval, who signed with Guydo, was a French writer, illustrator and caricaturist. He came from a family of ancient nobility, and had no artistic background or education. He debuted in 1890, illustrating 'La Pupille de Pollichinelle' by O. Le Roy. Since 1893, he contributed to many satirical magazines of the time, including Le Triboulet, Nos Vieux, La Caricature and Le Chat Noir. For the latter, he drew various black cats, that became mascottes for the magazine and the cabaret.
He continued his career as an artist and caricaturist in pretigious magazines like Femina, Le Rire, L'Amour, L'Assiette au Beurre, Chronique Amusante, Le Frou Frou, Gil Blas and La Lanterne de Bruant. In 1908, he was one of the illustrators for the illustrated encyclopedia magazine Je Sais Tout. He began a collaboration with La Semaine de Suzette in 1905. Guydo additionally wrote and illustrated children's books. He was part of the Montmartre artist group in Paris. Guydo died in 1931, and his personal diaries and memoires were destroyed during a bombing in World War II.