Oliba had three brothers and a sister, and when his father chose to retire to a monastery in 988, his lands were divided among his three oldest sons; Bernard received Besalú, Wilfred received Cerdanya, and Oliba received Berga and Ripoll.
Oliba havde tre brødre og en søster, og da hans far i 988 gik i kloster, delte han sit land mellem de tre ældste sønner; Bernard fik Besalú og Ripoll, Vilfred fik Cerdanya, mens Oliba fik Berga.