Agnieszka Osiecka was a Polish poet, writer, author of theatre and television screenplays, film director and journalist. She was a prominent Polish songwriter, having authored the lyrics to more than 2000 songs, and is considered an icon of Polish culture.

Agniya Lvovna Barto was a Soviet poet and children's writer of Belarusian Jewish origin.

Agniya Vasilyevna Desnitskaya was a Soviet and Russian linguist, a specialist in Indo-European languages, esp. Germanic languages and the Albanian language, literature and folklore. Professor of Leningrad State University, candidate member of the USSR Academy of Sciences via Department of Literature and Language.

Agniya Aleksandrovna Kuznetsova was a Russian Soviet children's writer.

Agnolo Firenzuola was an Italian poet and litterateur.

Agop Melkonyan was a Bulgarian writer of Armenian descent. He is best known as an author of science fiction short stories and novels. He was also a translator, journalist, editor and scholar.

Agostinho Barbosa was a prolific Portuguese writer on canon law. His work included dictionary-type surveys of the legal elements.

Agostino Mascardi was an Italian rhetorician, historian and poet.

Agostino Paravicini Bagliani is an Italian historian, specializing in the history of the papacy, cultural anthropology, and in the history of the body and the relationship between nature and society during the Middle Ages.

Agrestius was the bishop of Lugo in the Roman province of Gallaecia. He attended the Council of Orange in the year 441. He is usually identified with the author of the Versus Agresti episcopi de fide ad Avitum episcopum, a poem and letter addressed to Avitus, then prefect of Gaul. The chronicler Hydatius, in his account of 433, suggests that Agrestius had Priscillianist leanings.