Good question, there. I didn't know there'd be more than one version...PROBABLY the first one. It's gone through so many changes, it's hard to tell. Let's see....right now: DeCook, then back one: de Coch, then: de Cocke, so I'm pretty sure originally De Cock.
And no big hurry on the looking. If you can find something, great, if not - still great. You're still the BEST! (((hugs))) I'll track it down either way. I just think you may get better 'hits' on searches for places in France for me to look. Records, etc. I've got to compile the list of names/ancestry while my Dad still remembers them.