190s BC deaths

Eratosthenes of Cyrene ( ; ;  – ) was an Ancient Greek polymath: a philosopher, scholar, mathematician, geographer, poet, astronomer, and music theorist. Eratosthenes eventually became the chief librarian at the Library of Alexandria. His work was the precursor to the modern discipline of geography, and he introduced some of its terminology, coining the terms geography and geographer.

ancient Greek geometer and astronomer noted for his writings on conic sections

Bactarian King

Horwennefer ( "Horus-Onnophris"; ), also known as Hurganophor or Haronnophris, was an Egyptian who led Upper Egypt in secession from the rule of Ptolemy IV Philopator in 205 BC. Along with his successor, Ankhwennefer (also known as Chaonnophris or Ankhmakis), they held a large part of Egypt until 186 BC. No monuments are attested to this king, but a graffito dating to about 201 BC on a wall of the mortuary Temple of Seti I at Abydos, in which his name is written (), is an attestation to the extent of his influence and the ideology of his reign. He appears to have died before 197 BC.

Roman consul 219 BC

Dionysodorus of Caunus (, c. 250 BC – c. 190 BC) was an ancient Greek mathematician.