#poseidon
- Agenor — A legendary character in Greek mythology, king of Phoenicia, son of Poseidon and Libya, famously known as the father of Europa, Cadmus, Phoenix, and Cilix. In structurally eloquent mythological accounts, he is the one who sends his sons to search for Europa, abducted by Zeus disguised as a bull, forbidding them to return without her, which led to the founding of major ancient European cities.
- Aloeus — Secondary Romanianized form or spelling variant for the name of the Greek mythological character Aloeus (Alöeus), legendary king of Thessaly and son of Poseidon. In older lexicographical indexes, the term is registered as a proper noun used to indicate the kinship or patronymic attributed to the giant Aloadae (his adoptive or biological sons), who attempted to storm heaven and overthrow the Olympian gods.
- Aloeus — A character in Greek mythology, son of Poseidon and Canace, married to Iphimedia and the nominal or adoptive father of the giant Aloadae (Otus and Ephialtes). In modern sciences, the term serves as a specific epithet in entomology (e.g., Strategus aloeus, the ox beetle) or as a proper name for various classical geographical or historical elements.
- Amphitrite — A goddess of the sea in Greek mythology, one of the nereids (or oceanids), the wife of Poseidon and mother of Triton. In classical art, she is often depicted driving a chariot drawn by tritons or hippocamps, serving as the symbolic personification of the ocean's calm and majesty; her name is sometimes used figuratively in literature to designate the sea itself.
- Amphitrite — An ancient proper noun designating the goddess of the sea in Greek mythology, a prominent Nereid who became the wife of Poseidon and queen of the oceans; in astronomy, the term represents the S-type asteroid number 29 (29 Amphitrite), one of the largest celestial bodies in the main belt; in biology, it designates a genus of marine polychaete worms that live in sedimentary tubes.
- Amycus — The original Latin form for the proper name Amicos; a character in Greek mythology, king of the Bebryces and son of Poseidon, famous for his cruelty and the boxing match lost to the Argonaut Pollux. In astronomy, the name designates a centaur asteroid (55576 Amycus) orbiting in the outer solar system, named in honor of this mythological figure.
- Amymone — The original form for the proper name Amymone; a character in Greek mythology, one of the fifty Danaids, loved by Poseidon, who saved her from a satyr and created in her honor the spring bearing her name in the Lerna region. In zoology and entomology, the term designates butterfly species (such as Mestra amymone) or other organisms classified after this mythological toponym.