This item is fished from the fountain in Dalaran.
Required for Pilt:Money achievement.png
Inigo Montoy seems to get his name from Inigo Montoya, from the book The Princess Bride by William Goldman. Inigo's best known line is "Hello. My name is Inigo Montoya. You killed my father. Prepare to die." However, in World of Warcraft, there is no clear idea who is his father.
In the movie version of The Princess Bride, when Inigo is confronting his father's killer, he goes through a small dialogue in which his father's killer breaks down and says he will give him anything he wishes. Inigo says "I want my father back, you son of a bitch," and kills him.
Some also ponder the fact that the name is more than just a tribute, and that it might have a deeper meaning. The fact that he obviously takes the phylactery of Kel'Thuzad for himself (or unknown masters) may be a hint to show that Kel'Thuzad might be Montoy's father (as the quote mentioned above would suggest), or some other close relative. Alternatively, Montoy's father could have been killed by Kel'Thuzad.