LOGAN

(origin: Gaelic.) An inclosed plain or low-lying place. If the residence of a Briton was on a plain, it was called Lann, from Lagen or Logen; if on an eminence, it was termed dun.

Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.

LOGAN. A Celtic word used In Scottish topography, both singly and as a pi-efix, and siguifyiug a hollow place, or plain, or meadow surrounded by rising grounds, Gaz. of Scotl.

Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.