Question: Which peoples inhabited this territory where Saint Walpurga was an abbess in the 8th century?
Context: Normandy was a province in the North-West of France under the Ancien Régime which lasted until the latter part of the 18th century.  Initially populated by Celtic tribes in the West and Belgic tribes in the North East, it was conquered in 98 AD by the Romans and integrated into the province of Gallia Lugdunensis by Augustus.  In the 4th century, Gratian divided the province into the civitates that constitute the historical borders.  After the fall of Rome in the 5th century, the Franks became the dominant ethnic group in the area, built several monasteries, and replaced the barbarism of the region with the civilization of the Carolingian Empire.  Towards the end of the 8th century, Viking raids devastated the region, prompting the establishment of the Duchy of Normandy in 911.  After 150 years of expansion, the borders of Normandy reached relative stability.  These old borders roughly correspond to the present borders of Lower Normandy, Upper Normandy and the Channel Islands.  Mainland Normandy was integrated into the Kingdom of France in 1204.  The region was badly damaged during the Hundred Years War and the Wars of Religion, the Normans having more converts to Protestantism than other peoples of France.  In the 20th century, D-Day, the 1944 Allied invasion of Western Europe, started in Normandy.  In 1956, mainland Normandy was separated into two régions, Lower Normandy and Upper Normandy, and were reunified in 2016. Francia or Frankia, also called the Kingdom of the Franks (Latin: "Regnum Francorum" ), Frankish Kingdom, Frankish Empire, Frankish Realm or occasionally Frankland, was the territory inhabited and ruled by the Franks, a confederation of West Germanic tribes, during late antiquity and the Early Middle Ages. The history of Maharashtra can be traced to approximately the 4th century BCE.  From the 4th century BCE until 875, Maharashtri Prakrit and its Apabhraṃśas were the dominant languages of the region.  Marathi, which evolved from Maharashtri Prakrit, has been the lingua franca from the 9th century onwards.  The oldest stone inscriptions in Marathi language can be seen at Shravana Belgola in modern-day Karnataka at the foot of the Bahubali Statue.  In the course of time, the term Maharashtra was used to describe a region which consisted of Aparanta, Vidarbha, Mulak, Assaka(Ashmaka) and Kuntal.  Tribal communities of Naga, Munda and Bhil peoples inhabited this area, also known as Dandakaranya, in ancient times.  The name "Maharashtra" is believed to be originated from "rathi", which means "chariot driver".  Maharashtra entered the recorded history in the 2nd century BC, with the construction of its first Buddhist caves.  The name "Maharashtra" first appeared in the 7th century in the account of a contemporary Chinese traveler, Huan Tsang.  According to the recorded History, the first Hindu King ruled the state during the 6th century, based in Badami. Gazikumukh Shamkhalate was a Lak state that existed on the territory of present-day Dagestan in the period of the 8th to 17th centuries.  The capital of the shamkhalate in the 8th century was Kumukh, named as Gazi-Kumukh in the 14th century.  In the 15th century other political centers of shamkhalate were Bujnak, Tarki, Andirey and some other towns. Herher (Armenian: Հերհեր ; also Romanized as Gerger) is a village in the Vayots Dzor Province of Armenia.  It was once a fief of the Orbelian vassals, the Shahurnetsi family in the 13th century.  Within the village is a 19th-century church of Saint Gevorg, and south is a shrine of Grigor Lusavorich from 1296 with Saint Gevorg or Chiki Vank of 1297.  Southeast one km on a hill is the small Kapuyt Berd ("Blue Fortress").  Upon a hilltop one km northeast is Saint Sion Monastery, first mentioned in the 8th century.  At the complex are the churches of Saint Sion and Saint Astvatsatsin.  Other sites of historical significance are in close proximity to Herher, such as village ruins with khachkars of the 14th century. Saint Cera of Ireland (alternately Chera, Chier, Ciara, Cyra, Keira, Kiara, Kiera, Cier, Ciar) was an abbess in the 7th century who died in 679.  Her history is probably commingled with another Cera (alternately Ciar, Ciara) who lived in the 6th century.  However, some authors maintain that monastic mistakes account for references to Cera in the 6th century or that a single Cera had an exceptionally long life span. The Altmünster abbey near Mainz, Germany, was reputedly founded by Saint Bilihildis (d. 734), who served as the first abbess; however, it may well be a 7th-century foundation.  Though founded as a Benedictine abbey, it adopted the rule of the Cistercians in t he 13th century.  It was dissolved during the secularization of the 18th century, and the abbey buildings were demolished.  The abbey church was given to a Protestant congregation in the early 19th century; it was destroyed during World War II but rebuilt and reconsecrated. Lithuania Minor (Lithuanian: "Mažoji Lietuva" ; German: "Kleinlitauen" ; Polish: "Litwa Mniejsza" ; Russian: Máлая Литвá ) or Prussian Lithuania (Lithuanian: "Prūsų Lietuva" ; German: "Preußisch-Litauen" , Polish: "Litwa Pruska" ) is a historical ethnographic region of Prussia, later East Prussia in Germany, where Prussian Lithuanians or Lietuvininkai lived.  Lithuania Minor enclosed the northern part of this province and got its name due to the territory's substantial Lithuanian-speaking population.  Prior to the invasion of the Teutonic Knights in the 13th century, the main part of the territory later known as Lithuania Minor was inhabited by the tribes of Skalvians and Nadruvians.  The land became depopulated to some extent during the warfare between Lithuania and the Order.  The war ended with the Treaty of Melno and the land was resettled by Lithuanian newcomers, returning refugees, and the remaining indigenous Baltic peoples; the term Lithuania Minor appeared for the first time between 1517 and 1526.  With the exception of the Klaipėda Region, which became a mandated territory of the League of Nations in 1920 by the Treaty of Versailles and was annexed to Lithuania from 1923 to 1939, the area was part of Prussia until 1945.  Today a small portion of Lithuania Minor is within the borders of modern Lithuania and Poland while most of the territory is part of the Kaliningrad Oblast of Russia. The Cross of Mathilde (German: "Mathildenkreuz" ; Latin: "Crux Matildae" ) is an Ottonian processional cross in the "crux gemmata" style which has been in Essen in Germany since it was made in the 11th century.  It is named after Abbess Mathilde (died in 1011) who is depicted as the donor on a cloisonné enamel plaque on the cross's stem.  It was made between about 1000, when Mathilde was abbess, and 1058, when Abbess Theophanu died; both were princesses of the Ottonian dynasty.  It may have been completed in stages, and the "corpus", the body of the crucified Christ, may be a still later replacement.  The cross, which is also called the "second cross of Mathilde", forms part of a group along with the Cross of Otto and Mathilde or "first cross of Mathilde" from late in the preceding century, a third cross, sometimes called the Senkschmelz Cross, and the Cross of Theophanu from her period as abbess.  All were made for Essen Abbey, now Essen Cathedral, and are kept in Essen Cathedral Treasury, where this cross is inventory number 4. Walpurgis Night is the English translation of Walpurgisnacht ] , one of the Dutch and German names for the night of 30 April, so called because it is the eve of the feast day of Saint Walpurga, an 8th-century abbess in Francia.  In Germanic folklore, Walpurgisnacht, also called "Hexennacht " (Dutch: "heksennacht" ), literally "Witches' Night", is believed to be the night of a witches' meeting on the Brocken, the highest peak in the Harz Mountains, a range of wooded hills in central Germany between the rivers Weser and Elbe.  The first known written occurrence of the English translation "Walpurgis Night" is from the 19th century.  Local variants of Walpurgis Night are observed throughout Europe in the Netherlands, Germany, the Czech Republic, Slovenia, Sweden, Lithuania, Latvia, Finland, and Estonia.  In Denmark, the tradition with bonfires to fence off the witches going to the Brocken is observed as Saint John's Eve—essentially a midsummer celebration "with witches".
Answer: the Franks