Gaiman's family is of Polish-Jewish and other Eastern European Jewish origins. His great-grandfather emigrated from Antwerp, Belgium, to the UK before 1914 and his grandfather eventually settled in the south of England in the Hampshire city of Portsmouth and established a chain of grocery stores. Gaiman's grandfather changed his original family name of Chaiman to Gaiman. His father, David Bernard Gaiman, worked in the same chain of stores; his mother, Sheila Gaiman (née Goldman), was a pharmacist. He has two younger sisters, Claire and Lizzy.