As defined by A Concise Dictionary of Old Icelandic (Geir Zoëga):
fóstbróðir Old Icelandic word can mean:
- 1) foster-brother;
- 2) sworn brother (= eiðbróðir).
Possible runic inscription in Younger Futhark:ᚠᚢᛋᛏᛒᚱᚢᚦᛁᚱ
Also available in related dictionaries:
This headword also appears in dictionaries of other languages closely related to Old Icelandic.