Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
PENNANT
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
(origin: Cor. Br.) From Pen, a head, and nant, a vale, or dingle; the head of the dingle; the principal mansion of the family, Bychton, in Wales, being situated at the head of a considerable dingle on the old family estate.
Patronymica Britannica (1860)
PENNANT. A parish and a township in Montgomeryshire. The family are traced to the celebrated Tudor-Trevor, Lord of Hereford and Whittiugton.
Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
Surname type: Location or geographical feature
Region of origin: Europe