Hamingja
Luck / fortune-spirit
Hamingja — the luck or fortune-spirit attached to a person and (importantly in saga ethics) to a family line. The hamingja can be inherited, lent, or transferred at death; a man's hamingja is his cumulative fortunate-power, partly distinct from his individual choices. Often translated as 'luck' but the term carries more weight than that English word suggests.
Point 6 of 9 in Old Norse Nine-Part Soul (reconstructed)
Cross-tradition overlaps
No overlapping points are registered for this point.
Sources
Vatnsdœla saga (primary_canonical)
Vatnsdæla saga chs. 2–5 and 7–10 repeatedly use hamingja and related luck-language in accounts of inherited fortune, success, and the fate of a family line. These episodes support hamingja as a socially transmissible fortune-power, while the saga does not define it as a bodily organ.
Davidson, Gods and Myths of Northern Europe (secondary)