Question: The Boniface Association owes its name to which Anglo-Saxon missionary through the Frankish Empire?

Context paragraphs:
Donar's Oak: Jove's Oak ("interpretatio romana" for Donar's Oak and therefore sometimes referred to as Thor's Oak) was a sacred tree of the Germanic pagans located in an unclear location around what is now the region of Hesse, Germany.  According to the 8th century "Vita Bonifatii auctore Willibaldi", the Anglo-Saxon missionary Saint Boniface and his retinue cut down the tree earlier the same century.  Wood from the oak was then reportedly used to build a church at the site dedicated to Saint Peter.  Sacred trees and sacred groves were widely venerated by the Germanic peoples.

Anglo-Saxon mission: Anglo-Saxon missionaries were instrumental in the spread of Christianity in the Frankish Empire during the 8th century, continuing the work of Hiberno-Scottish missionaries which had been spreading Celtic Christianity across the Frankish Empire as well as in Scotland and Anglo-Saxon England itself during the 6th century (see Anglo-Saxon Christianity).

Saint Walpurga: Saint Walpurga or Walburga (Old English: "Wealdburg" , Latin: "Valpurga, Walpurga, Walpurgis" ; c. AD 710 – 25 February 777 or 779), also spelled Valderburg or Guibor, was an Anglo-Saxon missionary to the Frankish Empire.  She was canonized on 1 May ca. 870 by Pope Adrian II.  Walpurgis Night (or "Walpurgisnacht") is the name for the eve of her day, which coincides with May Day.

Francia: 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.

Boniface Association: The Boniface Association, in German Bonifatiuswerk, is a Roman Catholic organization whose primary aim is to support Catholicism in largely Protestant areas of Germany and areas formerly part of the German empire.  Founded in 1849 and still in existence, it owes its name to Saint Boniface, traditionally hailed as "The Apostle of the Germans."

Saint Boniface: Saint Boniface (Latin: "Bonifatius" ; 675 – 5 June 754 AD), born Winfrid, Wynfrith, or Wynfryth in the kingdom of Wessex in Anglo-Saxon England, was a leading figure in the Anglo-Saxon mission to the Germanic parts of the Frankish Empire during the 8th century.  He established the first organized Christianity in many parts of Germania.  He is the patron saint of Germania, the first archbishop of Mainz and the "Apostle of the Germans".  He was killed in Frisia in 754, along with 52 others.  His remains were returned to Fulda, where they rest in a sarcophagus which became a site of pilgrimage.  Facts about Boniface's life and death as well as his work became widely known, since there is a wealth of material available—a number of "vitae", especially the near-contemporary "Vita Bonifatii auctore Willibaldi", and legal documents, possibly some sermons, and above all his correspondence.

List of German monarchs: This is a list of monarchs who ruled over the German territories of central Europe from the division of the Frankish Empire in 843 (by which a separate Eastern Frankish Kingdom was created), until the collapse of the German Empire in 1918.  It also includes heads of the various German confederations after the collapse of the Holy Roman Empire of the German Nation in 1806, and head of the first federation state, the North German Confederation, from 1867 to 1871.

Saxons: The Saxons (Latin: "Saxones" , Old English: "Seaxe" , Old Saxon: "Sahson" , Low German: "Sassen" , German: "Sachsen" , Dutch: "Saksen" , Welsh: "Saeson" ) were a group of Germanic tribes first mentioned as living near the North Sea coast of what is now Germany (Old Saxony), in the late Roman empire.  They were soon mentioned as raiding and settling in many North Sea areas, as well as pushing south inland towards the Franks.  Significant numbers settled in large parts of Great Britain in the early Middle Ages and formed part of the merged group of Anglo-Saxons who eventually organised the first united Kingdom of England.  Many Saxons however remained in Germania (Old Saxony c. 531-804), where they resisted the expanding Frankish Empire through the leadership of the semi-legendary Saxon hero, Widukind.  Initially, Saxons of Britain and those of Old Saxony (Northern Germany) were both referred to as 'Saxons' in an indiscriminate manner.  The term Anglo-Saxon, in turn, came into practice in the 8th century (probably by Paul the Deacon) to distinguish English Saxons from continental Saxons (Ealdseaxe, 'old Saxons').

Principality of Lower Pannonia: The Balaton Principality (Slovak: "Blatenské kniežatstvo" ,Slovene: "Blatenska kneževina" ) or Principality of Lower Pannonia, was a Slavic principality, vassal to the Frankish Empire, or according to others a "comitatus" (county) of the Frankish Empire, led initially by a "dux" (Pribina) and later by a comes (Pribina's son, Kocel).  It was one of the early Slavic polities (Kocel's title was ""Comes de Sclauis"" - Count of the Slavs) and was situated mostly in Transdanubia region of modern Hungary, but also included parts of modern Slovenia, Croatia, Serbia and Austria.

Excarpsus Cummeani: The Excarpsus Cummeani, also called the Pseudo-Cummeani, is an eighth-century penitential, probably written in the north of the Frankish Empire in Corbie Abbey.  Twenty-six copies of the manuscript survive; six of those were copied before 800 CE.  It is possible that the penitential, which extends its scope beyond monasticism to include clerics and lay people, has a connection to Saint Boniface and his efforts to reform the Frankish church in the first half of the eighth century.  Geographic spread by the end of the eighth century and continued copying of the manuscript into the 9th and 10th centuries have been interpreted to mean the work was considered "by the Christian authorities" a canonical text.  It was used as late as the eleventh century, "as the main source of the "P. Parisiense compositum".

Supporting paragraphs: Boniface Association Saint Boniface
Answer: Saint Boniface