Does the Artorias Boss Soul weapon count towards Knight's Honor?

Edit: Solved, appreciate the help. I'll go an murder the dog again.

For Knight's Honor you need 3 weapons from Sif's Soul: Abyss Greatsword, Artorias Greatsword, and Greatshield of Artorias.

Now Artorias' Soul makes one of the Greatswords, does that count towards the achievement or do I need to kill Sif 3 times?