August
mid 17th century: from French auguste or Latin augustus ‘consecrated, venerable’.
wiktionary
From French auguste(“noble, stately; august”) or Latin augustus(“majestic, venerable, august; imperial, royal”), [1] from augeō(“to augment, increase; to enlarge, expand, spread”), ultimately from Proto-Indo-European *h₂ewg-(“to enlarge, increase”). Doublet of Augustus.
From August.
august (plural augusts)
etymonline
august (adj.)
"inspiring reverence and admiration, solemnly grand," 1660s, from Latin augustus "venerable, majestic, magnificent, noble," perhaps originally "consecrated by the augurs, with favorable auguries" (see augur (n.)); or else [de Vaan] "that which is increased" (see augment).
August
eighth month, late 11c., from Latin Augustus (mensis), sixth month of the later Roman calendar, renamed from Sextilis (literally "sixth") in 8 B.C.E. to honor emperor Augustus Caesar, literally "Venerable Caesar" (see august (adj.), and compare Augustus). One of two months given new names to honor Roman leaders ( July being the other), the Romans also gave new imperial names to September (Germanicus) and October (Domitian) but these did not stick.
In England, the name replaced native Weodmonað "weed month." Traditionally the first month of autumn in Great Britain, the last of summer in the U.S.
