||A tour guide employed by the Greyfriars party when searching for Major Cherry in the Sahara.
||A camel driver in Egypt.
|IJURRA, Signor Pedro
||A South American adventurer who came to England to seek out Hazeldene's Uncle, Captain Cunliffe, in order to settle a feud. He was killed after falling from a cliff.
||A tramp who was employed by Roger Crompton to capture Ragged Dick.
||One of the tramps engaged by Mr Hacker to quell the Tuckshop Rebellion.
||A member of Lorrell's Lambs, a mob that spent some time at the Anchor Inn at Pegg.
||One of the many farmers in the vicinity of Greyfriars. His orchard is a favourite haunt of Greyfriars boys.
||A Greyfriars schoolboy in the Sixth Form. A Greek fop and bully who was close to Loder and his crew.
|IRONS, Inspector Richard
||An inspector from Scotland Yard who was in charge of the hunt for the Courtfield Cracksman. He took temporary charge of the Remove to hide his identity.
||A billiards marker at the Cross Keys Inn.
||A fence in Puggins Alley when Flip was living there.
||An investment adviser who was robbed of a valuable diamond ring by Sniggerson.
||An inhabitant of Courtfield. He always starts the bidding at Mr. Grimes auction rooms with a bid of half a sovereign.
|ISAACS, Mr. Ikey
||A Moneylender in Dale, a village a couple of miles from Greyfriars. Hazeldene borrowed money from him and couldn't pay it back. Harry Wharton stepped in and settled the debt for him.
|ISAACS, Mr. Isac
||A moneylender who was trying to recover a debt from Sir Charles Lovelace.
||The son and assistant of the moneylender Ikey Isaacs
|ISAACS, Mr. Sammy
||A Stamp dealer in Friardale. He suggested to Gadsby of the Shell that he steal Mr Capper's valuable stamp and sell it to him.
||A name assumed by the convict Howard Devarney when running a business consultancy in the city.
||A japanese servant of Cyrus Parker.
||Along with Dimitri, he was a Russian Bolshevik in England assigned to kill any Rusian aristocrats fleeing the revolution, or their family in England. When Bunter purchased his Russian title, the two men tried to get him but were arrested.
|IVES, Mr. Seth
||A brutal poacher who operated in the area surrounding Wharton Lodge.