Jamieson, Fausset and Brown on Deuteronomy 3:9

9. Hermon--now Jebel-Es-Sheick--the majestic hill on which the long and elevated range of Anti-Lebanon terminates. Its summit and the ridges on its sides are almost constantly covered with snow. It is not so much one high mountain as a whole cluster of mountain peaks, the highest in Palestine. According to the survey taken by the English Government Engineers in 1840, they were about 9376 feet above the sea. Being a mountain chain, it is no wonder that it should have received different names at different points from the different tribes which lay along the base--all of them designating extraordinary height: Hermon, the lofty peak; "Sirion," or in an abbreviated form "Sion" (De 4:48), the upraised, glittering; "Shenir," the glittering breastplate of ice.