Origin of pony
- Probably from obsolete French poulenet diminutive of poulain colt from Late Latin pullāmen young of an animal from Latin pullus pau-1 in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition
- 1659 from Scots powny, apparently from Middle French poulenet (“little foal"), ultimately from Late Latin pullanus (“young of an animal") (cognate to English foal).
- Shortened from pony and trap, rhyming with crap