Onion is thought to have originated more than 5000 years ago in Central Asia and is one of the most ancient of food sources. Its consumption by humans can be traced back to the Bronze Age. A staple in the diet of many early civilizations, it was especially important in ancient Egypt.
Ancient Greek athletes consumed large quantities of them thinking it would "balance" their blood and improve their athletic prowess. Later, after conquering Greece, Romans ate onions regularly and also rubbed it on their gladiators to tone their muscles.
In Hebrew, the word ‘ba•tzal’ appears in the Bible as the construct form name: Be•tzal•el (Bezalel in English). As such, it means ‘God’s root.’