Paal "the Silent" Håkonsson

PAUL [II] Hakonsson "the Silent" (-after 1137). Orkneyinga Saga records that earl Hakon “had another son Paul…the Silent”[971]. He succeeded his father in [1126] as Joint Jarl of Orkney and Caithness, jointly with his half-brother, sole Jarl after the latter's death in [1131]. His second cousin, Kali-Ragnvald, rebelled in 1135 and demanded a half share of Orkney. In revenge for being refused, the latter seized Shetland in 1136, but Paul [II] defeated him in Yell Sound 27 Jun 1136. The following year he again seized the Shetlands, and captured and deposed Paul [II] in 1137. http://fmg.ac/Projects/MedLands/SCOTTISH%20NOBILITY.htm#PaulIdied1098B

Said to have narrowly escaped an assassination attempt by his father's mistress/second wife Helga and her sister Frakokk, who sewed a poisoned shirt intended for him. Fortunately for him but unfortunately for his half-brother Harald (who was Helga's own son), Harald was jealous of the fine workmanship and put it on first. Oops.... (Orkneyinga Saga)

Helga, Frakokk, and both their households were banished to Sutherland.