The actual name of the Queen of Sheba is unknown. She is sometimes referred to as Bilqis in Islamic tradition, but this name isn't mentioned in the Quran. The name Bilqis is believed to be derived from the Arabic word "Balkis", which means "strong" or "powerful."
It is important to note that the name Bilqis is a later addition to the story and there's no concrete historical evidence to confirm it as her real name.