Here is a list of mythical creatures beginning with this letter and I am constantly gathering information from each continent and continually updating.
Antaeus (Greek)
Antaeus, known to the Berbers as Anti, was a figure in Berber and Greek mythology. He was famed for his defeat by Heracles as part of the Labours of Hercules. In Greek sources, he was the half-giant son of Poseidon and Gaia, who lived in the interior desert of Libya.
His wife was the goddess Tinge, for whom it was claimed that the city of Tangier in Morocco was named (though it could be the other way around), and he had a daughter named Alceis or Barce. Another daughter, Iphinoe, consorted with Heracles. Antaeus would challenge all passers-by to wrestling matches and remained invincible as long as he remained in contact with his mother, the earth.