The addition of 'o' and 'ie' to words and names. - It is very common for names to be changed by adding either the letter 'o' or the letters 'ie', as in Johnno for John or Hughie for Hugh. There is no hard and fast rule for how this gets done but it is something you learn...
1922 Joyce Ulysses 169: – He’s not too bad, Nosey Flynn said. He has been known to put his hand down too to help a fellow. put one’s hand out (v.) to go through a drunk person’s pockets looking for cash and/or valuables. 1953 1953 ‘William Lee’ Junkie (1966) 159: ...
in Leader (2000) 226: The documents are now proved to have been forged for a hoax to fool people and make monkeys of them. 1961 G. Marx letter 7 Feb. in Groucho Letters (1967) 224: You would have heard from me before now if I hadn’t been making monkeys out of Shakespeare and ...