Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
VENTRIS
As described in historical dictionaries
Patronymica Britannica (1860)
VENTRIS. Venturas is a not uncommon surname in Italy; and it may he found among the doctors of the canon law in England, in the middle ages, A place in the arrondissemcnt of Montague, in Normandy, is called La Ventrouse.