 Leibulf's origins are unknown, though the probability is high that he was a native of Provence where he held "ex rebus proprietas" (allodial land) in Arles.His rise to power occurred in the last years of the reign of Charlemagne (768 – 814), who may have granted him many of the "honores" he held.Along with Bera's Goths and Duke Sancho I's Gascons, he led a contingent of Provençals on Louis the Pious' expedition against Barcelona in 801 – 802.