Ulf of Borresta (Old Norse: Ulfr í Báristöðum, modern Swedish: Ulf i Borresta) was a runemaster in the eleventh century Uppland, Sweden, and a successful Viking who returned from England three times with a share of the Danegeld.
He is named after his estate which in modern Swedish is called Borresta or Bårresta (Old Norse: Báristaðir[1] or Bárastaðiʀ[2]).
Ulf belonged to a clan in what is today the parish of Orkesta, located in present-day Vallentuna Municipality, and he was the paternal nephew and successor of a man named Ónæmr,[3] a name which means "slow learner".
[5] Another cousin of Ulf named Ragnvaldr was the commander of the Varangian Guard in Constantinople and made the runestone U 112 in memory of himself and his mother, Ónæmr's daughter.
[8][9] The runestone U 343 reports Ulf's death and it was raised in his memory by his sons Karsi and Karlbjörn.