name of an ancient Teutonic tribe that harassed the Roman Empire from time to time from the days of Caesar to 4c., from Latin Marcomanni, from a Germanic compound, literally "men of the border;" first element cognate with Old High German mark, Old English mearc "border" (see march (n.2)). For second element, see man (n.). Related: Marcomannic.
Entries linking to Marcomanni
"a frontier, boundary of a country; border district," early 13c., from Old French marche "boundary, frontier," from Frankish *marka or some other Germanic source (compare Old Saxon marka, Old English mearc; Old High German marchon "to mark out, delimit," German Mark "boundary"), from Proto-Germanic *markō; see mark (n.1)). Now obsolete. Related: Marches.
In early use often in reference to the borderlands beside Wales, sometimes rendering Old English Mercia; later especially of the English border with Scotland. There was a verb marchen in Middle English (c. 1300), "to have a common boundary," from Old French marchier "border upon, lie alongside," which survived in dialect.
This is the old Germanic word for "border, boundary," but as it came to mean "borderland" in many languages, other words were shifted or borrowed to indicate the original sense (compare border (n.), bound (n.)"border, boundary"). Modern German Grenze is from Middle High German grenize (13c., replacing Old High German marcha), a loan-word from Slavic (compare Polish and Russian granica). Dutch grens, Danish groense, Swedish gräns are from German.
"a featherless plantigrade biped mammal of the genus Homo" [Century Dictionary], Old English man, mann "human being, person (male or female); brave man, hero;" also "servant, vassal, adult male considered as under the control of another person," from Proto-Germanic *mann- (source also of Old Saxon, Swedish, Dutch, Old High German man, Old Frisian mon, German Mann, Old Norse maðr, Danish mand, Gothic manna "man"), from PIE root *man- (1) "man." For the plural, see men.
Sometimes connected to root *men- (1) "to think," which would make the ground sense of man "one who has intelligence," but not all linguists accept this. Liberman, for instance, writes, "Most probably man 'human being' is a secularized divine name" from Mannus [Tacitus, "Germania," chap. 2], "believed to be the progenitor of the human race."
Specific sense of "adult male of the human race" (distinguished from a woman or boy) is by late Old English (c. 1000); Old English used wer and wif to distinguish the sexes, but wer began to disappear late 13c. and was replaced by man. Universal sense of the word remains in mankind and manslaughter. Similarly, Latin had homo "human being" and vir "adult male human being," but they merged in Vulgar Latin, with homo extended to both senses. A like evolution took place in Slavic languages, and in some of them the word has narrowed to mean "husband." PIE had two other "man" roots: *uiHro "freeman" (source of Sanskrit vira-, Lithuanian vyras, Latin vir, Old Irish fer, Gothic wair; see *wi-ro-) and *hner "man," a title more of honor than *uiHro (source of Sanskrit nar-, Armenian ayr, Welsh ner, Greek anēr; see *ner- (2)).
Man also was in Old English as an indefinite pronoun, "one, people, they." It was used generically for "the human race, mankind" by c. 1200. As a word of familiar address, originally often implying impatience, c.1400; hence probably its use as an interjection of surprise or emphasis, since Middle English but especially popular from early 20c.
As "a woman's lover," by mid-14c. As "adult male possessing manly qualities in an eminent degree," from 14c. Man's man, one whose qualities are appreciated by other men, is by 1873. Colloquial use of the Man for "the boss" is by 1918. To be man or mouse "be brave or be timid" is from 1540s. Meaning "piece with which a game (especially chess) is played" is from c. 1400.
Man-about-town "man of the leisure class who frequents clubs, theaters, and other social resorts" is from 1734. Man of the world is from mid-14c. as "secular man, layman;" by early 15c. as "man experienced in the ways of the world, one able to take things in stride." To do something as one man "unanimously" is from late 14c.
So I am as he that seythe, 'Come hyddr John, my man.' 
MANTRAP, a woman's commodity. [Grose, "Dictionary of the Vulgar Tongue," London, 1785]
At the kinges court, my brother, Ech man for himself. [Chaucer, "Knight's Tale," c. 1386]