Gregory’s paternal grandparents were George Edward Smith and Anne Joan Brown. Gregory’s maternal grandfather was Harvey Franklin Oster (the son of Theodore David Oster and Ruth Singer). Theodore was a Jewish immigrant, who was born in Germany, to Maurice/Morris Oster and Barbella Lrank.Ruth was born in New York, to Jewish parents from Hungary, Ignatz Singer and Sarah or Lena Selkules/Seckules.Gregory’s maternal grandmother was Louise Mae Merchant (the daughter of George Elmer Merchant and Mable/Mabelle/Mabel A. George was born in North Dakota, the son of George E.
Dean, although a half-blood, could not prove that he had any wizarding heritage, and was therefore in danger when Lord Voldemort took control of the Ministry of Magic in 1997.
Dean was forced to go on the run to avoid arrest and imprisonment by the Muggle-Born Registration Commission, missing his seventh year of schooling.
He was eventually captured by Snatchers, but escaped Malfoy Manor along with several other prisoners and soon returned to Hogwarts School of Witchcraft and Wizardry to participate in the Battle of Hogwarts.
He is the son of English-born producer Maurice Smith and American-born actress Terrea Oster. Gregory’s maternal grandfather was Jewish (from a family from Germany and Hungary).
Gregory’s maternal grandmother had English, Swedish, Norwegian, Dutch, German, and remote French, ancestry.