The a-rune ᚨ, Younger Futhark ᚬ was probably named after the Æsir, in Proto-Germanic *Ansuz. The shape of the rune is likely from Neo-Etruscan a ( Its name survives only in the Icelandic rune poem as Óss, however, referring to Odin, identified with Jupiter:
The Norwegian rune poem, Óss has a meaning of "estuary" while in the Anglo-Saxon one, futhorc Os ᚩ has the Latin meaning of "mouth". The Younger Futhark rune is transliterated as ą to distinguish it from the new Ár rune (ᛅ), which contines the Jēran rune after loss of prevocalic *j- in Proto-Norse *jár (Old Saxon jār). The name of A variant of the rune is Futhorc Æsc ᚫ "ash". The Latin ligature Æ in Old English was called Æsc after the rune. Another variant is Ac "oak" ᚪ. See also
| | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||