Following from Pliny's account, the shepherd's name has been often cited as giving rise to the Latin root word and etymological source of the English word for magnet and the coterie of its related word forms such as magnetite, magnet, magnetism, magnesium, manganese and others. Other authorities, including the Roman poet and philosopher Lucretius (c. 99 BCE – c. 55 BCE), have attributed the etymology of magnet, and progeny, to the name of the Lydian city, Magnesia ad Sipylum (Manisa, Turkey in modern times), where magnetic ore may have first been discovered or recognized. Other ancient locations have been attributed as the origin, including the Greek province Thracian Magnesia, and the Ionian city of Magnesia ad Maeandrum.