Brian May and Roger Taylor founded the band Smile in 1968, with Tim Staffell as the vocalist. He studied with Freddie Mercury at Ealing Art College, who was a big fan of the band. Therefore, when Time Staffell left the group to join another, Humpy Bong, May and Taylor immediately thought of Mercury. One the three of them were together, Smile’s name became Queen’s at the suggestion of Freddie himself. By 1970, they were presented for the first time in the City Hall of the city of Truto, and then that same year, they met John Deacon in a bar and they called him to be part of the band definitively. This one appeared with them for the first time in 1971. By this same date, Freddie Mercury designed the logo of the band inspired by the zodiacal signs of its members: that is why you see two lions, by Deacon and Taylor who were Leo, a crab for May, who was Cancer, and two fairies for Mercury, who was Virgo.
Information Courtesy of: https://history-biography.com/history-of-queen/