Footballers are really original so the nick names are always thought out... add a Y on the end of most, an Ah on some and ers on the rest. An O can also be slapped on. To answer your original question, Jacky or Jacko will be the Wolves players name.
I suspect modern footballers aren't clever enough to come up with nicknames of that quality any more. It's genius.
Best one I can remember was from Cricket. In the early nineties Mark Waugh, despite his talent, could not really get into the Aussie team alongside his brother Steve, who was making a huge impact and would soon be captain. Mark became known in and around the team as 'Afghanistan' the forgotten war!
Off track be there was a guy who had one leg shorter than the other and he walked with a sway and was called 'snipers nightmare '
There might be a few left who can. But the younguns are having humour driven out of their lives by the thought police.
I hope Ndidi at Leicester is known as "Yes" by his team mates As mentioned earlier Fitz Hall's is probably the best one In other sports you get some good ones - cricketer Chris Old was known as chilly, rugby player Martin Offiah was known as Chariots My personal favourite is the late Justin Edinburgh known affectionately as "Musselburgh"
Coincidentally the Alan Smith that played for Arsenal & Leicester was also nicknamed 'Smudge', so it's either a surname Smith thing or a Alan Smith name thing hah