Sam, check the original mention of him in the One Morning In Haditha, Time piece, they say that Wahid is not his real name. He said he was afraid of retribution.
Walid is certainly Wahid, take it to the bank.
Yes, I realize that. I'm certain Walid and Wahid Al Obeidi are the same guy. My doubts are the subsquent permutations to Abdul Wahab Al Obeidi.
However it is fairly clear that Walid/Wahid had some connection to BRussels Tribune. And Abdul Wahab Al Obeidi what writing details about Haditha back in December long before anybody else seemed to have any interes:
http://tinyurl.com/qb9p7
So it probably is the same guy, or a relative. But I'd rather be safe than sorry.