Dates?, active about 1 - 50

Ennion worked as a glassmaker about 1 to 50 A.D. His signature is known from over thirty surviving pieces, and many other works are attributed to him on the basis of style. Ennion created the ground-breaking technique of blowing glass vessels into molds. This new process allowed the vessel and its decoration to be created at the same time and permitted the creation of multiple copies of the same vessel. Ennion's clear, precise designs distinguish his work; he also minimized the visibility of the lines caused by the seams in the mold.

The location of Ennion's workshop is debated, in part because his work is found throughout the Roman Empire. Some scholars believe he worked in Sidon in modern Lebanon, while others assert that he worked in northern Italy. The inscriptions he frequently used as decoration may provide a clue. Though his name may have been Semitic in origin, he signed it in Greek, the language of the eastern Mediterranean, not Italy. The city of Sidon, where he may have worked, had all the raw material for glass-making and extensive trade connections.