This level was named for Kieran Millar, hospitalized for heart surgery around the time the game was made. In an e-mail from Dr. Peter McClean Millar to Alex Meyer (webmaster of World of the Lemmings):
Just as a bit of information for you. On the Xmas 94 demo, one of the levels is called Quest for Kieran - that is my son. He had to go into hospital in 1993 for a heart operation and I wrote to Psygnosis asking if the would send some posters to him and a get well card from the Lemmings (it was a life threatening operation with only mediam survival rate) in the hope that it would help him. Well they did him proud. Named a level for him and sent T-shirts, mugs, posters, stickers and a tape of lemmings music.damn fine company. I'm glad to say Kieran's operation was a complete success and he is now a healthly, normal young boy. In hospital he spent all his time listening to the music (which was actually quite good).
Another e-mail to Meyer followed this one:
For your information, Kieran was diagosed with Coarctation of the Aeorta. This is a condition where the aeorta (main artery running from the heart) narrows. In kieran, his aeorta narrowed to 2 milimeters over a 5 milimeter length. He was operated on in Great Ormond Street Childrens Hospital in London where they removed the constriction and joined the aeorta up again. The operation was a complete success and he is now just like any normal young boy.
Information about Pete, Kieran and the rest of the family can be found at http://www.millar.org.