I'd say the lookup tool would have to be the decisive factor here. What it says is most common should generally be used, however I agree that there should be room to argue/document that another name is more common.

That being said, I think the tool should use the original title field as the one being counted and not the title field as this is different for different localities, editions etc and there fore will make the count artificially high.

My honest sympathy, skipnet50. I had a similar drama with one of my cats earlier this year as well...

Ok, back on topic now ...
with Google I definitely could not get a decisive answer, although the more well-known sites such as IMDB, Wikipedia, etc... seem to go for DKU. This is also a small majority in the current DP database and also a small majority in the forum poll.
So I will probably go submit the changes in favor of DKU. Note that if those get voted yes, it will automatically resolve the credits tool issue, since the balance will be into DKU even more .

Quoting Repter:

Quote:

So I will probably go submit the changes in favor of DKU. Note that if those get voted yes, it will automatically resolve the credits tool issue, since the balance will be into DKU even more .

I don't think so. My understanding is, as Pdf256 said, that the Credit Lookup Tool tallies on names as they are actually credited in film credits. You can use it the Tool to determine the so-said "Common Name", which can be different than the name in the credits of a single movie, but is decided according to most frequent credited form. 
AFAIU.

Quoting Addicted2DVD:

Quote:
I don't know what is enough... but documentation is providing proof... so the way I read it that means you must provide proof that it is the way you say it is. Note that this is how I personally read it... if other see it differently I don't know... and if this is what Ken had in mind only he could say.

Since in this case all of her film titles show up in the Invelos database for both of her names, that is indeed proof that the Invelos database is of no value in making a determination of her common name. Literally ever single movie is credited wrongly to one name or the other. This is proof that the database cannot be used in this case.

The next step would be to provide proof of which name is more frequently credited. That would require other sources and would be tougher to do.

But on the face of it, in this particular case, the Invelos database is of zero determining value.

Hypothetical Invelos lookup example:

Name A
-----------
Movie 1
Movie 2
Movie 3

Result = 3 titles

Name B
----------
Movie 1
Movie 1 - French
Movie 2
Movie 2 - Rental
Movie 3

Result = 5 titles

Is Name B most-credited? Not exactly. We can see from the above that she must have been incorrectly credited in at least 3 of the profiles, but it could be as many as 5 incorrect credits. Therefore, the true results could be 3-0 or 0-3 or 2-1 or 1-2 depending on how she is actually credited. From the Invelos data alone, one can't tell whether it's 3-0 or 0-3 or 2-1 or 1-2. It's certainly not 3-5 as she only has 3 total film credits.

This is the same scenario as we are faced with in the lookup for this actress in the Invelos lookup. All of her film credits appear under each name variant.