As defined by the Cleasby & Vigfusson Old Norse to English dictionary:
- u, f., proncd. erla or atla, [arta], the wagtail, motacilla alba, now called Máríatla or lín-erla.
Possible runic inscription in Younger Futhark:ᛁᚱᛏᛚᛅ
Younger Futhark runes were used from 8th to 12th centuries in Scandinavia and their overseas settlements