As defined by the Cleasby & Vigfusson Old Norse to English dictionary:
- tví-söngr (tví-sǫngr)
- m. a two-voiced song; see tví-syngja.
Orthography: The Cleasby & Vigfusson book used letter ö to represent the original Old Norse vowel ǫ. Therefore, tví-söngr may be more accurately written as tví-sǫngr.
Possible runic inscription in Younger Futhark:ᛏᚢᛁ-ᛋᚢᚾᚴᚱ
Younger Futhark runes were used from 8th to 12th centuries in Scandinavia and their overseas settlements