Sibt al-Maridini, full name Muhammad ibn Muhammad ibn Ahmad ibn Muhammad ibn al-Ghazal, was an Egyptian-born astronomer and mathematician. His father came from Damascus. The word “Sibt al-Maridini” means “the son of Al-Mardini’s daughter”. His maternal grandfather, Abdullah al-Maridini, was a reputed astronomer of the eighth century AH. He was a disciple of the astronomer Ibn al-Majdi (d. 850/1506).