As defined by the Cleasby & Vigfusson Old Norse to English dictionary:
- m. the east sea, the east Baltic (Estmere of king Alfred, Oros. Ed. Bosworth, p. 22), Ýt. 18.
Possible runic inscription in Younger Futhark:ᛅᚢᛋᛏ-ᛘᛅᚱᚱ
Younger Futhark runes were used from 8th to 12th centuries in Scandinavia and their overseas settlements