Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
PORTAL
As described in historical dictionaries
Patronymica Britannica (1860)
PORTAL. The family are said to have been originally Spanish, and to haAe established themselves in Languedoc at the end of the XL century. Adopting, after some centuries' residence in that province, the principles of the Huguenots, some of their members were compelled to leave France after the Revocation of the Edict of Nantes. The founder of the family in England was Henri Portal, who settled in Hampshire, B.L.G.