Queen was a band, not a royal family, so they didn't have brothers and sisters in the traditional sense.
However, the four members of Queen were:
* Freddie Mercury (lead vocals, piano, songwriting)
* Brian May (lead guitar, vocals, songwriting)
* John Deacon (bass, backing vocals, songwriting)
* Roger Taylor (drums, percussion, vocals, songwriting)
While they weren't related by blood, they were all incredibly close and considered each other family. They worked together for over 20 years, creating some of the most iconic music in history.