first family
From Longman Dictionary of Contemporary Englishfirst familyˌfirst ˈfamily, First Family noun → the first familyExamples from the Corpusfirst family• But it is her first family she craves.• Too much had been vested in his first family.• He also outraged his first family by his second marriage to an actress of dubious reputation.• It suggested that second marriages would substantially infringe the rights of inheritance of the members of the first family.• The Victorian family was the first family form in history which was both long-lasting and intimate.