Iñigo Montoya, the world's greatest fencer, is a character in William Goldman's book The Princess Bride (which is better known as a movie). He is famous for the legendary quote, "Hello, my name is Iñigo Montoya. You killed my father. Prepare to die."
Inigo is a Welsh name rather than an English name, supported by your inclusion of the architect Inigo Jones as a famous bearer of the name. He was a Welshman, working in England.
Inigo Skimmer, mhm mhm, is a supporting character in The Fifth Elephant, a book from Terry Pratchett's Discworld series. A seemingly harmless clerk with a nervous habit of clearing his throat who reveals surprising abilities later on, mhm mhm.