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: Historical immigration to Great Britain
Content:  The later middle ages saw substantial Flemish migration to England, Wales and Scotland. The term "Fleming" was used to refer to natives of the Low Countries overall rather than Flanders specifically. The first wave of Flemings arrived in England following floods in their low-lying homelands during the reign of Henry I. Eventually, the migrants were planted in Pembrokeshire in Wales. According to the Brut y Tywysogyon, the native inhabitants were driven from the area, with the Flemish replacing them. This region, in which Flemish and English were spoken from an early date, came to be known as Little England beyond Wales. Many of the early Flemish settlers in England were weavers, and established themselves in the larger English towns and cities. In Scotland, Flemish incomers contributed to the burgeoning wool trade in the southeastern part of the country.
Title: Flemish people
Content:  Prior to the 1600s, there were several substantial waves of Flemish migration to the United Kingdom. Today, numerous towns in England and Wales boast large or majority populations with Flemish ancestry as a result. The first wave fled to England in the early 12th Century, escaping damages from a storm across the coast of Flanders, where they were largely resettled in Pembrokeshire by Henry I. They changed the culture and accent in south Pembrokeshire to such an extent, that it led to the area receiving the name Little England beyond Wales. Haverfordwest and Tenby consequently grew as important settlements for the Flemish settlers. 
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:  extent facilitated the creation of the de jure social, political and linguistic equality of Dutch from the end of the 19th century. After the Hundred Years War many Flemings migrated to the Azores. By 1490 there were 2,000 Flemings living in the Azores. Willem van der Haegen was the original sea captain who brought settlers from Flanders to the Azores. Today many Azoreans trace their genealogy from present day Flanders. Many of their customs and traditions are distinctively Flemish in nature such as Windmills used for grain, São Jorge cheese and several religious events such as the imperios and the feast of the Cult of the Holy Spirit.
Title: Flemish people
Content:  The original County of Flanders encompassed areas which today belong to France and the Netherlands, but are still host to people of Flemish descent and some continued use of Flemish Dutch. Namely, these are Zeelandic Flanders and the Arrondissement of Dunkirk (historically known as French Westhoek). The people of North Brabant also share related ancestry.
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: 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.

Question: where did flemish people come from?
Answer: Belgium.