Dafna Feith is the daughter of Douglas Feith. She attended Charles E. Smith Jewish Day School (class of 2009). She grew up in a family with strong ties to the Jewish community and advocacy for Israel, influenced by her paternal grandparents Dalck Feith (who passed away in 2005) and Rose Feith, who instilled these values in their descendants. Her siblings include David Feith (who has worked in U.S. national security roles, including on the Trump administration's National Security Council), Daniel Feith, and Dore Feith. Public records link family members to addresses in Washington, D.C., New York, NY, and Bethesda, MD.