Hliðskjalf (Old Norse) comes from Old Norse hlið, from Proto-Germanic hlidą, from Proto-Indo-European ḱlitós, from Proto-Indo-European ḱley-, from Proto-Indo-European ḱel- — to cover; to incline.
Ancestry of “Hliðskjalf”, step by step
Hliðskjalf traces back through two separate lines of ancestry.