From Middle English somer, sumer, from Old English sumor (“summer"), from Proto-Germanic *sumaraz (“summer"), from Proto-Indo-European *sam-, *sem-, *smÌ¥-hâ‚‚-ó- (“summer, year"). Cognate with Scots somer, sumer, simer (“summer"), West Frisian simmer (“summer"), Saterland Frisian Suumer (“summer"), Dutch zomer (“summer"), Low German Sommer (“summer"), German Sommer (“summer"), Swedish sommar (“summer"), Icelandic sumar (“summer"), Welsh haf (“summer"), Armenian Õ¡Õ´ (am, “year"), Õ¡Õ´Õ¡Õ¼ (amaá¹™, “summer"), Sanskrit [script?] (sámā, “a half-year, season, weather, year").
From Wiktionary
Middle English beam, pack animal from Anglo-Norman sumer from Vulgar Latin saumārius from Late Latin sagmārius pertaining to a packsaddle, packhorse from sagma packsaddle sumpter
From American Heritage Dictionary of the English Language, 5th Edition
From Anglo-Norman somer, sumer, from Vulgar Latin saumārius, for Latin sagmārius, from sagma (“sum").
From Wiktionary
Middle English sumer from Old English sumor sem-2 in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition
