The earliest secure documentation of Aleramo and his immediate family is derived from the founding charter of the Abbey of Grazzano in 961. occasioned by the recent death of Aleramo's son Gugliemo.
Esimesed kindlad dokumendid Aleramo ja tema lähemate pereliikmete kohta pärinevad Grazzano kloostri asutamishartast aastal 961, mis tekkis pärast Aleramo poja Gugliemo hiljutist surma.