Ragnhildr Staegbrellsdóttir

She was sister and co-heir of Haraldr III, Jarl in Orkney and Earl of Caithness. Her first husband Lifolf "Pate" died fighting her brother. Her second husband Gunni Andresson inherited substantial estates from him.

INGIGERD. Orkneyinga Saga records the marriage of “Earl Rognvald…his daughter Ingerid” and “Eirik Stay-Brails”[917].
m (Sutherland Spring 1156) ERIK Slagbrellir, son of ERIL Streita & his wife Audhild [daughter of Thorliot].
Erik & his wife had [seven] children: (Cawley's Medlands)

(1) HARALD Eriksson "Ungi" ([1156]-killed in battle Wick 1198).
(2) MAGNUS Mangi (-killed in battle near Fimreite on Sognefjord 15 Jun 1184).
(3) ROGNVALD.
(4) INGEBIORG.
(5) ELIN.
(6) RAGNHILD. Orkneyinga Saga names (in order) “Ingibjorg, Elin and Ragnhild” as the daughters of “Eirik Stay-Brails”[924]. Orkneyinga Saga records that “Ragnhild, the sister of Earl Harald the Young” married “Lifolf Pate”[925].
m HLIFOLF Skalli of Sutherland. Chief Counsellor of his brother-in-law Jarl Harald III. (Cawley's Medlands)
(7) daughter .