Claudius Agathemerus (ancient Greek, Gr. ) was an Ancient Greek medicine, ancient Greek physician who lived in the 1st century. He was born in the Lacedaemon, and was a pupil of the philosopher Lucius Annaeus Cornutus, Cornutus, in whose house he became acquainted with the poet Persius about 50 AD. In the old editions of Suetonius he is called ''Agaternus'', a mistake which was first corrected by Reinesius, from the epitaph upon him and his wife, Myrtale, which is preserved in the ''Marmora Oxoniensia'' and the ''Greek Anthology.'' The apparent anomaly of a Roman praenomen being given to a Greek may be accounted for by the fact which we learn from Suetonius, that the Spartans were the hereditary clients of the gens Claudia.

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