Áttján

As defined by A Concise Dictionary of Old Icelandic (Geir Zoëga):

áttján

card. numb. eighteen, the older form = átján.

Possible runic inscription in Younger Futhark:ᛅᛏᛏᛁᛅᚾ

Also available in related dictionaries:

This headword also appears in dictionaries of other languages closely related to Old Icelandic.

• Old Norwegian - Johan Fritzner's Dictionary