Old Frisian in the context of "Low German"

The settlement of Great Britain by Germanic peoples from continental Europe led to the development of an Anglo-Saxon cultural identity and a shared Germanic language—Old English—whose closest known relative is Old Frisian, spoken on the other side of the North Sea. The first Germanic speakers to settle in Britain permanently are likely to have been soldiers recruited by the Roman administration in the 4th century AD, or even earlier. In the early 5th century, during the end of Roman rule in Britain and the breakdown of the Roman economy, larger numbers arrived, and their impact upon local culture and politics increased.

There is ongoing debate about the scale, timing and nature of the Anglo-Saxon settlements and also about what happened to the existing populations of the regions where the migrants settled. The available evidence includes a small number of medieval texts which emphasize Saxon settlement and violence in the 5th century but do not give many clear or reliable details. Linguistic, archaeological and genetic information have played an increasing role in attempts to better understand what happened. The British Celtic and Latin languages spoken in Britain before Germanic speakers migrated there had very little impact on Old English vocabulary. According to many scholars, this suggests that a large number of Germanic speakers became important relatively suddenly. On the basis of such evidence it has even been argued that large parts of what is now England were clear of prior inhabitants, perhaps due to mass deaths from the Plague of Justinian. However, a contrasting view that gained support in the late 20th century suggests that the migration involved relatively few individuals, possibly centred on a warrior elite, who popularized a non-Roman identity after the downfall of Roman institutions. This hypothesis suggests a large-scale acculturation of natives to the incomers' language and material culture. In support of this, archaeologists have found that, despite evidence of violent disruption, settlement patterns and land use show many continuities with the Romano-British past, despite profound changes in material culture.

Old Saxon (Low German: Ooldsass'sche Spraak), also known as Old Low German (Low German: Ooldneddersche Spraak), was a Germanic language and the earliest recorded form of Low German (spoken nowadays in Northern Germany, the northeastern Netherlands, southern Denmark, the Americas and parts of Eastern Europe). It is a West Germanic language, closely related to the Anglo-Frisian languages. It is documented from the 8th century until the 12th century, when it gradually evolved into Middle Low German. It was spoken throughout modern northwestern Germany, primarily in the coastal regions and in the eastern Netherlands by Saxons, a Germanic tribe that inhabited the region of Saxony. It partially shares Anglo-Frisian's (Old Frisian, Old English) Ingvaeonic nasal spirant law which sets it apart from Low Franconian and Irminonic languages, such as Dutch, Luxembourgish and German.

The grammar of Old Saxon was fully inflected with five grammatical cases (nominative, accusative, genitive, dative, and instrumental), three grammatical numbers (singular, plural, and dual), and three grammatical genders (masculine, feminine, and neuter). The dual forms occurred in the first and second persons only.

Anglo-Saxon runes or Anglo-Frisian runes are runes that were used by the Anglo-Saxons and Medieval Frisians (collectively called Anglo-Frisians) as an alphabet in their native writing system, recording both Old English and Old Frisian (Old English: ᚱᚢᚾᚪ, romanized: rūna, lit. 'rune'). Today, the characters are known collectively as the futhorc (ᚠᚢᚦᚩᚱᚳ, fuþorc) from the first six runes and their sound values. The futhorc was a development from the older co-Germanic 24-character runic alphabet, known today as Elder Futhark, expanding to 28 characters in its older form and up to 34 characters in its younger form. In contemporary Scandinavia, the Elder Futhark developed into a shorter 16-character alphabet, today simply called Younger Futhark.

Use of the Anglo-Frisian runes is likely to have started in the 5th century onward and they continued to see use into the High Middle Ages. By the 8th century, they were eventually overtaken by the Old English Latin alphabet introduced to Anglo-Saxon England by missionaries at the end of the 6th century. Futhorc runes were no longer in common use by the 11th century, but MS Oxford St John's College 17 indicates that fairly accurate understanding of them persisted into at least the 12th century.

Thor (from Old Norse: Þórr) is a prominent god in Germanic paganism. In Norse mythology, he is a hammer-wielding god associated with thunder, storms, strength, protection, fertility, farmers, and free people. Besides Old Norse Þórr, the deity occurs in Old English as Thunor, in Old Frisian as Thuner, in Old Saxon as Thunar, and in Old High German as Donar, all ultimately stemming from the Proto-Germanic theonym *Þun(a)raz, meaning 'Thunder'.

Thor is a prominently mentioned god throughout the recorded history of the Germanic peoples, from the Roman occupation of regions of Germania, to the Germanic expansions of the Migration Period, to his high popularity during the Viking Age, when, in the face of the process of the Christianization of Scandinavia, emblems of his hammer, Mjölnir, were worn and Norse pagan personal names containing the name of the god bear witness to his popularity.

Frigg (/frɪɡ/; Old Norse: [ˈfriɡː]) is a goddess, one of the Æsir, in Germanic mythology. In Norse mythology, the source of most surviving information about her, she is associated with marriage, prophecy, clairvoyance and motherhood, and dwells in the wetland halls of Fensalir. In wider Germanic mythology, she is known in Old High German as Frīja, in Langobardic as Frēa, in Old English as Frīg, in Old Frisian as Frīa, and in Old Saxon as Frī, all ultimately stemming from the Proto-Germanic theonym *Frijjō. Nearly all sources portray her as the wife of the god Odin.

In Old High German and Old Norse sources, she is specifically connected with Fulla, but she is also associated with the goddesses Lofn, Hlín, Gná, and ambiguously with the Earth, otherwise personified as an apparently separate entity Jörð (Old Norse: 'Earth'). The children of Frigg and Odin include the gleaming god Baldr.

The Anglo-Frisian languages are a proposed sub-branch of the West Germanic languages encompassing the Anglic languages (English, Scots, extinct Fingallian, and extinct Yola) as well as the Frisian languages (North Frisian, East Frisian, and West Frisian). While this relationship had considerable support historically, many modern scholars have criticized it as a valid phylogenetic grouping. Instead, they believe that the Ingvaeonic languages comprised a dialect continuum which stretched along the North Sea, finally diverging into distinct languages – Old English, Pre–Old Frisian, and Old Saxon – during the Migration Period in the 5th century. There are still proponents of an Anglo-Frisian node in the West Germanic tree, citing strong archeological and genetic evidence for the comingling of these groups. In the 1950s, Hans Kuhn argued that the two languages diverged at the Ingvaeonic level, but later "converged". He argued that this convergence explained the striking similarity of the two languages while also explaining the issues in chronology. This view has been dismissed as improbable given the geographic divide.

The Anglo-Frisian languages have been distinguished from other West Germanic languages due to several sound changes: besides the Ingvaeonic nasal spirant law, which is present in Low German as well, Anglo-Frisian brightening and palatalization of /k/ are for the most part unique to the modern Anglo-Frisian languages:

North Sea Germanic, also known as Ingvaeonic (/ˌɪŋviːˈɒnɪk/ ING-vee-ON-ik), is a subgrouping of West Germanic languages that consists of Old Frisian, Old English, and Old Saxon, and their descendants. These languages share a number of commonalities, such as a single plural ending for all persons of the verb, the Ingvaeonic nasal spirant law, common changes to the Germanic vowel *a, a plural form -as, and a number of other features which make scholars believe they form a distinct group within West Germanic.

It is debated whether the shared features of North Sea Germanic are inherited from a common proto-language or formed through later contact and influence. Additionally, the membership of the group is sometimes debated. Some scholars exclude Low German for lacking a number of features associated with North Sea Germanic. Other scholars include Dutch for sharing some features with the group.