"Freddie: Kermit – after Muppet character Kermit the Frog. During Fred’s ‘ballet’ period in 1977, he took to wearing white leotards on stage and when exposed under green lights, his lithe body in the skin-tight costume made him look like the Muppet character – especially when he sat on the steps of the stage set.
Usually, he was referred to by the crew simply as Fred, but, if he was being difficult, he could become The Goofy Toothed Rascal or, if he was being very difficult, all manner of uncomplimentary names – including ‘Horsey’. Nothing to do with Fred’s teeth, but with his appreciation of Russian-born ballet dancer Vaslav Nijinsky.
Brian: Percy – after Percy Thrower, the original British TV gardener. Brian was very keen on nature and gardening, and in 1976, when I was delivering some equipment at night to his London house, he answered the door in ragged clothes, a torch in hand, with his mane of hair interwoven with twigs and leaves. He had been out in the dark attending to his beloved plants and trees. He immediately got an update to The Infrared Gardener, due to his academic studies in astrophysics and infrared astronomy.
Roger: Blind Melon Taylor he had been nicknamed in the studio in Montreux in 1978, when rehearsing a New Orleans ‘bluesy’ number. Roger had many nicknames, the most popular being Rainbow Man. The most fashion conscious in Queen, Rog was always buying clothes, the majority in very bright, bold colours and worn in the most unlikely combinations. (He could have auditioned for the lead part in Joseph and the Technicolor Dream Coat.)
John: Birdman or Deaky (self-explanatory). John had all his hair cropped off military-style at the start of the ’78 USA tour and looked like The Bird Man of Alcatraz. He received it in good spirits and wore the convict’s outfit the crew bought for him for the show encore."
From Queen Unseen: My Life with the Greatest Rock Band of the 20th Century Book by Peter Hince