Guido Casoni was an Italian Baroque poet, jurist, and writer. He was a forerunner of Marinism, anticipating the tastes and values of the Baroque years before Seicentismo became the leading fashion in Italian literature.
Guido Crepas, better known by his pen name Guido Crepax, was an Italian comics artist. He is most famous for his character Valentina, created in 1965 and very representative of the spirit of the 1960s. The Valentina series of books and strips became noted for Crepax's sophisticated drawing, and for the psychedelic, dreamlike storylines, generally involving a strong dose of erotism. His work was often politically motivated too, inspired by his Communist convictions. A film based on his work called Baba Yaga, featuring the character Valentina, was made in 1973.
Guido delle Colonne was a 13th-century Italian judge and writer, who lived in Messina. He is the author of a prose narrative of the Trojan War entitled Historia destructionis Troiae, that was based on De excidio Trojae historia written by Dares Phrygius and Ephemeridos belli Trojani written by Dictys Cretensis.
Guido Pieter Theodorus Josephus Gezelle was an influential writer and poet and a Roman Catholic priest from Belgium. He is famous for the use of the West Flemish dialect.
Guido Guinizelli was an esteemed Italian love poet and is considered the "father" of the Dolce Stil Novo. He was the first to write in this new style of poetry writing, and thus is held to be the ipso facto founder. He was born in, and later exiled from, Bologna, Italy. It is speculated that he died in Verona, Italy.