1520s, of a people of what is now souther and southeastern Belgium, also of their language, from French Wallon, literally "foreigner," of Germanic origin (compare Old High German walh "foreigner"). The people are of Gaulish origin and speak a French dialect. The name is a form of the common appellation of Germanic peoples to Romanic-speaking neighbors. See Vlach, also Welsh. As a noun from 1560s; as a language name from 1640s.
Native-American people from the southwestern Great Plains, 1819, from Spanish, from a word in a Shoshonean language, such as Ute kimánci "enemy, foreigner." Their territory was Comancheria. Comanchero was a 19c. name given to Hispanic and American traders who dealt with the Comanches.
district in southwestern Scotland (Medieval Latin Gallovidia), equivalent to Welsh Gallwyddel, Irish Gallgaidhil, literally "foreign Gaels," containing the Gal- element also common in Irish place-names (Irish Gaelic gall) and meaning there "a stranger, a foreigner," especially an Englishman. Related: Gallovidian, which is from the Latin form of the name. The adjective Galwegian is on analogy of Norwegian.
county in the far southwest of England, from Old English Cornwalas (891) "inhabitants of Cornwall," literally "the Corn Welsh," from the original Celtic tribal name *Cornowii (Latinized as Cornovii), literally "peninsula people, the people of the horn," from Celtic kernou "horn," hence "headland," from PIE *ker- (1) "horn; head, uppermost part of the body" (see horn (n.)), in reference to the long "horn" of land on which they live. To this the Anglo-Saxons added the plural of Old English walh "stranger, foreigner," especially if Celtic (see Welsh). The Romans knew it as Cornubia; hence poetic Cornubian.
1842, in reference to the alphabet adopted by Slavic people belonging to the Eastern Church, from St. Cyril, 9c. apostle of the Slavs, who supposedly invented it. The alphabet replaced earlier Glagolitic. The name Cyril is Late Latin Cyrillus, from Greek Kyrillos, literally "lordly, masterful," related to kyrios "lord, master" (see church).
It is believed to have superseded the Glagolitic as being easier both for the copyist to write and for the foreigner to acquire. Some of its signs are modified from the Glagolitic, but those which Greek and Slavic have in common are taken from the Greek. It was brought into general use by St. Cyril's pupil, Clement, first bishop of Bulgaria. The Russian alphabet is a slight modification of it. [Century Dictionary]
Old English Wielisc, Wylisc (West Saxon), Welisc, Wælisc (Anglian and Kentish) "foreign; British (not Anglo-Saxon), Welsh; not free, servile," from Wealh, Walh "Celt, Briton, Welshman, non-Germanic foreigner;" in Tolkien's definition, "common Gmc. name for a man of what we should call Celtic speech," but also applied in Germanic languages to speakers of Latin, hence Old High German Walh, Walah "Celt, Roman, Gaulish," and Old Norse Val-land "France," Valir "Gauls, non-Germanic inhabitants of France" (Danish vælsk "Italian, French, southern"); from Proto-Germanic *Walkhiskaz, from a Celtic tribal name represented by Latin Volcæ (Caesar) "ancient Celtic tribe in southern Gaul."
As a noun, "the Britons," also "the Welsh language," both from Old English. The word survives in Wales, Cornwall, Walloon, walnut, and in surnames Walsh and Wallace. Borrowed in Old Church Slavonic as vlachu, and applied to the Rumanians, hence Wallachia. Among the English, Welsh was used disparagingly of inferior or substitute things (such as Welsh cricket "louse" (1590s); Welsh comb "thumb and four fingers" (1796), and compare welch (v.)). Welsh rabbit is from 1725, also perverted by folk-etymology as Welsh rarebit (1785).