Yngvi
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Old Norse Yngvi, Old High German Ing/Ingwi and Old English Ing 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.
"Yngvi-Freyr builds the Uppsala temple" (1830) by Hugo Hamilton.
Bind rune
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A bind rune or bindrune is a Migration Period Germanic ligature of two or more runes. They are extremely rare in Viking Age inscriptions, but are common in earlier (Proto-Norse) and later (medieval) inscriptions.
A boat whose mast is formed with the bind runes þ=r=u=t=a=ʀ= =þ=i=a=k=n, on the runestone Sö 158 at Ärsta, Södermanland, Sweden. The bind runes tell that the deceased was a strong thegn.
Cryptic runic inscription on a silver knife mount, with several bind runes
The "Derbyshire bone plate", showing the name Hadda with ligatured double ᛞ
A bind rune for the word runaʀ on the Sønder Kirkeby Runestone in Denmark