Johann Bayer
Celestial cartographer Johann Bayer gave Bayer designations to eight stars, labelling them Alpha to Theta. English astronomer John Flamsteed added the letters x, mistaken as Chi (χ), y and z to 13, 14, and 15 Sagittae in his "Catalogus Britannicus". All three were dropped by later astronomers John Bevis and Francis Baily.