Middle English Yore, Jor, from Old English Earp, corrupted from Ear + ƿ (abbreviation for ƿæter (“water”)); first element from Brythonic Isurā with loss of intervocalic s, ultimately from Proto-Indo-European *isərós (“vigorous, quick”), from *eis(ə, related to Sanskrit इषिरम् (iṣiram, “fast, quick”). Compare the Gaulish river Isara.
- Smith, A.H. (1962). The Place-names of the West Riding of Yorkshire. 7. Cambridge University Press.
- plural of