Jam-

Meaning of Old Norse word "jam-"

As defined by the Cleasby & Vigfusson Old Norse to English dictionary:

jam-

and jamn-, see jafn-.

Possible runic inscription in Younger Futhark:ᛁᛅᛘ-
Younger Futhark runes were used from 8th to 12th centuries in Scandinavia and their overseas settlements