Gender: FemaleRelated Names: Sadie Meanings: Form of Sarah: Princess (Hebrew; Old Testament—wife of Abraham, mother of Isaac and Ishmael); joyful (Swahili, East Africa). Form of Saada or Sada: Happiness (Swahili, East Africa). Resource References: What’s In a Name? Unaitwaje? A Swahili Book of NamesProud Heritage: 11,001 Names for Your African-American BabyA World of Baby Names