People - Ancient Greece: Glaucus of Chios According to Herodotus, Glaucus was "the inventor of
the art of welding."
Glaucus of Chios in Wikipedia
According to Herodotus, Alyattes, the Lydian King and father of Croesus, gave a salver of welded iron to the Oracle of Delphi. This salver, "the most remarkable of all the offerings at Delphi," was the work of Glaucus of Chios, "the inventor of the art of welding."