Yngvi

Old Norse Yngvi, Old High German Inguin and Old English Ingƿine are names that relate to a theonym which appears to have been the older name for the god Freyr. Proto-Germanic *Ingwaz was the legendary ancestor of the Ingaevones, or more accurately Ingvaeones, and is also the reconstructed name of the Elder Futhark rune ᛜ and Anglo-Saxon rune ᛝ, representing ŋ.
Runes

Runes are the letters in a set of related alphabets known as runic alphabets, which were used to write various Germanic languages before the adoption of the Latin alphabet and for specialised purposes thereafter. The Scandinavian variants are also known as futhark or fuþark ; the Anglo-Saxon variant is futhorc or fuþorc.
Elder Futhark

The Elder Futhark, Elder Fuþark, Older Futhark, Old Futhark or Germanic Futhark is the oldest form of the runic alphabets. It was a writing system used by Germanic tribes for Northwest Germanic dialects in the Migration Period, the dates of which are debated among scholars. Runic inscriptions are found on artifacts, including jewelry, amulets, plateware, tools, weapons, and, famously, runestones, from the 2nd to the 8th centuries.
Proto-Norse

Proto-Norse was an Indo-European language spoken in Scandinavia that is thought to have evolved as a northern dialect of Proto-Germanic in the first centuries CE. It is the earliest stage of a characteristically North Germanic language, and the language attested in the oldest Scandinavian Elder Futhark inscriptions, spoken from around the 2nd to the 8th centuries CE. It evolved into the dialects of Old Norse at the beginning of the Viking Age around 800 CE, which later themselves evolved into the modern North Germanic languages.
Migration Period sword
The Migration Period sword was a type of sword popular during the Migration Period and the Merovingian period of European history, particularly among the Germanic peoples was derived from the Roman era spatha, and gave rise to the Carolingian or Viking sword type of the 8th to 11th centuries AD.
Witch (word)
The word witch derives from the Old English nouns wicca Old English pronunciation: [ˈwɪttʃɑ] and wicce Old English pronunciation: [ˈwɪttʃe]. The word's further origins in Proto-Germanic and Proto-Indo-European are unclear.