Title: Flemish
Content:  The English adjective Flemish (first attested as flemmysshe, c. 1325; compare Flæming, c. 1150), meaning "from Flanders", was probably borrowed from Old Frisian. The Old Dutch form is flāmisk, which becomes vlamesc, vlaemsch in Middle Dutch and Vlaams in Modern Dutch. The word Vlaams itself is derived from flâm, an Ingaevones word, from the Germanic flauma (a cognate to the English flow and the Old German word flaum), which means 'flow or current'. The name Vlaanderen was formed from a stem flâm-, with a suffix -ðr- attached.
Title: Flemish
Content:   Flemish (Vlaams) is a Low Franconian dialect cluster of the Dutch language. It is sometimes referred to as Flemish Dutch (Vlaams-Nederlands), Belgian Dutch (Belgisch-Nederlands ), or Southern Dutch (Zuid-Nederlands). Flemish is native to Flanders, a historical region in northern Belgium; it is spoken by Flemings, the dominant ethnic group of the region. Outside of Flanders, it is also spoken to some extent in French Flanders and the Dutch Zeelandic Flanders.
Title: Flemish people
Content:  The Flemish or Flemings (Vlamingen ) are a Germanic ethnic group native to Flanders, Belgium, who speak Flemish Dutch. They are one of two principal ethnic groups in Belgium, the other being the French-speaking Walloons. Flemish people make up the majority of the Belgian population, at about 60%. "Flemish" was historically a geographical term, as all inhabitants of the medieval County of Flanders in modern-day Belgium, France, and the Netherlands were referred to as "Flemings", irrespective of their ethnicity or language. The contemporary region of Flanders comprises a part of this historical county, as well as parts of the medieval duchy of Brabant and the medieval county of Loon, where the modern Flemish ethnic group and culture gradually formed.
Title: County of Flanders
Content:  Flanders and Flemish (Dutch: Vlaanderen, Vlaams) are likely derived from the Frisian *flāndra and *flāmisk (in Old Frisian flamsk), the roots of which are Germanic *flaumaz meaning "overflow, flooding". The coastal area of Flanders was flooded twice per day from the 3rd century to the 8th century by the North Sea at the time when the coast was frequently visited by Frisian (cattle) traders and probably largely inhabited by Frisians. The Flemish people are first mentioned in the biography of Saint Eligius (ca. 590–660), the Vita sancti Eligii. This work was written before 684, but only known since 725. This work mentions the "Flanderenses", who lived in "Flandris."
Title: Terminology of the Low Countries
Content:  Flemish (Vlaams) is derived from the name of the County of Flanders (Graafschap Vlaanderen), in the early Middle Ages the most influential county in the Low Countries, and the residence of the Burgundian dukes. Due to its cultural importance, "Flemish" became in certain languages a pars pro toto for the Low Countries and the Dutch language. This was certainly the case in France, since the Flemish are the first Dutch speaking people for them to encounter. In French-Dutch dictionaries of the 16th century, "Dutch" is almost always translated as Flameng. A calque of Vlaams as a reference to the language of the Low Countries was also in use in Spain. In the 16th century, when Spain inherited the Habsburg Netherlands, the whole area of the Low Countries was indicated as Flandes, and 
Title: Clan Fleming
Content:  The surname Fleming is derived from the French, le Fleming, which indicates that the family originated in Flanders. The once powerful medieval principality of Flanders is now split between Belgium, the Netherlands and France. During the latter part of the twelfth century the Flemish were enterprising merchants who traded with England, Scotland and Wales. A distinguished Flemish leader named Baldwin settled with his followers in Biggar, South Lanarkshire under a grant of David I of Scotland. Baldwin became Sheriff of Lanark under Malcolm IV of Scotland and William the Lion and this office appears to have been hereditary for some time.
Title: Fleming (surname)
Content:  Fleming is a surname, likely indicating an ultimate descent from a Flemish immigrant – though this might be so remote that no record of it remains other than the name.
Title: Flemming
Content:  Flemming is a surname and a male given name referring, like the more common Fleming, to an inhabitant (or descendant thereof) of Flanders, a region overlapping parts of modern Belgium, France, and the Netherlands. Notable people with the name include:
Title: Flanders
Content:  the three institutional regions in Belgium, namely the Flemish Region. In the history of art and other fields, the adjectives Flemish and Netherlandish are commonly used to designate all the artistic production in this area before about 1580, after which it refers specifically to the southern Netherlands. For example, the term "Flemish Primitives", now outdated in English but used in French, Dutch and other languages, is a synonym for "Early Netherlandish painting", and it is not uncommon to see Mosan art categorized as Flemish art. In music the Franco-Flemish School is also known as the Dutch School. Within this Dutch-speaking part of Belgium, French has never ceased to be spoken by some citizens and Jewish groups have been speaking Yiddish in Antwerp for centuries. Today, Flanders' minority residents include 170 nationalities—the largest groups speaking French, English, Berber, Turkish, Arabic, Spanish, Italian and Polish.
Title: Flemish literature
Content:  Flemish literature is literature from Flanders, historically a region comprising parts of present-day Belgium, France and the Netherlands. Until the early 19th century, this literature was regarded as an integral part of Dutch literature. After Belgium became independent from the Netherlands in 1830, the term Flemish literature acquired a narrower meaning and refers to the Dutch-language literature produced in Belgium. It remains a part of Dutch-language literature.

Question: where do flemish come from?
Answer: Belgium.