Name of a dynasty of Greek rulers of ancient Egypt, or specifically Claudius Ptolemy, the 2nd-century astronomer and geographer.
From Greek Ptolemaios, possibly meaning 'warlike' from polemos meaning 'war.' The name became famous through the Ptolemaic dynasty founded by Alexander the Great's general Ptolemy I, and later through the astronomer whose geocentric model dominated Western thought for over a millennium.
Ptolemy the astronomer created a model of the universe so compelling that it dominated human understanding for 1,400 years until Copernicus proved the sun, not Earth, was the center of our solar system. His mathematical genius lay in making accurate predictions despite fundamentally wrong assumptions - showing how brilliant minds can create elegant theories built on incorrect foundations.
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