Who were the Nephillim

Who were the Nephillim ?

"The Nephilim were on the earth in those days—and also afterward—when the sons of God went in to the daughters of humans, who bore children to them. These were the heroes that were of old, warriors of renown."

The Nephillim were
mysterious beings or people of unusually large size and strength who lived both before and after the Flood. The Nephilim are referenced in Genesis and Numbers and are possibly referred to in Ezekiel. The Hebrew word nefilim is sometimes directly translated as “giants” or taken to mean “the fallen ones” (from the Hebrew naphal, “to fall”),