Middle English, from Anglo-French cuard, from cue, coe tail, from Latin cauda
First Known Use: 13th century
http://www.merriam-webster.com/dictionary/coward
According to the Online Etymology Dictionary, the word coward came into English from the Old French word coart (modern French couard), a combination of the word for "tail" (Modern French queue, Latin cauda) and an agent noun suffix. It would therefore have meant "one with a tail" — perhaps from the habit of animals displaying their tails in flight ("turning tail"), or from a dog's habit of putting its tail between its legs when it is afraid or cowed.[citation needed] Like many other English words of French origin, this word was introduced in the English language by the French-speaking Normans, after the Norman conquest of England in 1066.[2]
The
English surname Coward (as in
Noël Coward), however, has the same origin and meaning as the word "cowherd"
https://en.wikipedia.org/wiki/Cowardice