King’s College 2004 v Mistress Gunnvör sílfrahárr
25
Bynames of Relationship : Matronymics
*While people did occasionally bear matronymics it was extremely uncommon. There were a total of only 34 women in Iceland whose sons used their mother's name as a matronymic, and most of these lived in the northern and western districts of Iceland, including:
vEilif Guðrunarson
vHrafn Guðrunarson
vStein Herdísarson
vBersi Skald-Tórfuson
vKormak Dolluson
vOfeig Jarngerðsson of Skarð
*From the Academy of St. Gabriel:
vThe daughter of Ragnhildr would have been known as Ragnhildar dóttir... Ragnhildar was the genitive (possessive) form of Ragnhildr.  Metronymics (surnames that identified someone as her mother's daughter) were far less common than patronymics, but they were used in least some parts of the Viking world. (See http://www.s-gabriel.org/2708)
vThere was also a feminine name Hildr that was common in tenth-century Iceland.  Its possessive form was Hildar, and in principle the byname Hildar dóttir ‘daughter of Hildr’ is possible. In practice, however, metronymics -- names identifying the bearer's mother -- were very rare in Iceland, and we don't recommend this alternative.
(See http://www.s-gabriel.org/2769)