Gibborim was often penned to describe the chiefs and leaders as a variant title for dynastic kings descending from Rephaim giants like the kings of Ai, Gibeon, Persia, Medes, and the terrible kings listed in the abyss/pit prison in Ezekiel 32. Gibborim included the mighty/gibbowr princes of the earth prophesied in the end-time Gog war that will include Gog, Magog, Meschech, Tubal, Persia, Cush/Ethiopia, Libya, Gomer, and Togarmah.
From a New Testament prophetic perspective, one is guided to seek similar Greek words that might infer that gibborim, Terrible Ones, and Rephaim indeed are the end-time princes, kings, and great men as translated in English New Testaments. “‘Great’ men of the earth” in Revelation 18:23 derives from megistan’es meaning grandees, magnates, great men, lords, nobles, and chief, as derived from meg’istos meaning greatest and exceedingly great. Megistan’es was a Greek title for a tribal leader or chief, meaning a great and powerful man and the grandees of a kingdom. Grandees’ etymology derives from Latin grandis, meaning big, but seems to be Greek in origin based on Strong’s Dictionary’s megistan’es and its Greek designation. Grand/Grandee was understood as impressive in size and appearance, majestic, noble, magnificent, revered, chief, loftiness and grand, as in old, pedigree, and genealogical. The etymology of “grand” descends from Middle English grant meaning large and big, from Old French grant/grand for large and tall, and from Latin grandis meaning big, great, mighty, powerful, and weighty. Webster’s additionally defines “grand” as chief, highest rank, exalted, and magnificent.
The etymology of “mega” derives from Greek megas, translated also as “great” in the New Testament 149 times, and derives from Indo-European meg, meaning great, large, vast, big, tall, mighty, powerful, and important. “Great” is defined by Webster’s as large, larger, huge, chief, weighty, rank, and a direct descendant as in great-grandfather and bloodline. Its English etymology tracks through Old English great meaning big, tall, stout, massive, and from West German, Old Saxon, and Dutch as grauta, grot, and groot respectively.