Place name crossword clue. 7 letters. The Big One, Daily Telegraph Sydney, Wednesday 3 May 2017.
The answer is TOPONYM
Toponymy is the study of place names (toponyms), their origins, meanings, use, and typology.
Toponym is the general name for any place or geographical entity. Related, more specific types of toponym include hydronym for a body of water and oronym for a mountain or hill. A toponymist is one who studies toponymy.
According to the Oxford English Dictionary, the word “toponymy” first appeared in English in 1876; since then, toponym has come to replace “place-name” in professional discourse among geographers. It can be argued that the first toponymists were the storytellers and poets who explained the origin of specific place names as part of their tales; sometimes place-names served as the basis for the etiological legends. The process of folk etymology usually took over, whereby a false meaning was extracted from a name based on its structure or sounds.
Thus, the toponym of Hellespont was explained by Greek poets as being named after Helle, daughter of Athamas, who drowned there as she crossed it with her brother Phrixus on a flying golden ram. The name, however, is probably derived from an older language, such as Pelasgian, which was unknown to those who explained its origin. George R. Stewart theorized, in his book Names on the Globe, that Hellespont originally meant something like “narrow Pontus” or “entrance to Pontus”, “Pontus” being an ancient name for the region around the Black Sea, and by extension, for the sea itself.