Spring onion (green onion/scallion) in coq au vin?
Australian and keen Coq au Vin maker here; I am in Sydney so my response may be subject to regional variations; Australia is a big place.

There is yet another possibility. These

Coq au Vin requires onions twice; at the start, chopped, and later on, where the recipe I use (Mastering the Art of French Cooking) calls for small onions browned and braised in stock. In Australia it isn't easy to get onions of the right size for the latter dish - even the smallish onions sold as pickling onions are IMHO too big. The bulbs of the spring onions behind the link are the right size, about an inch in diameter.

As you can see from the other products on the page, yes, we have no standard naming convention. I'm British by birth, so I'll always refer to French Shallots as Shallots, and the OP's cebette as Spring Onions.

As an aside, http://www.theguardian.com/lifeandstyle/wordofmouth/2011/mar/24/how-perfect-coq-au-vin is well worth consulting. In fact the whole series is well worth consulting.