▁the ▁du chy ▁remained ▁en fe off ed ▁to ▁the ▁family ▁as ▁a ▁whole ▁rather ▁than ▁its ▁individual ▁members . ▁All ▁members ▁of ▁the ▁House ▁of ▁W elf , ▁male ▁or ▁female , ▁bore ▁the ▁title ▁Duke / D uch ess ▁of ▁Brun sw ick - L ü ne burg ▁in ▁addition ▁to ▁the ▁style ▁of ▁the ▁sub ordinate ▁princip ality . ▁By ▁ 1 7 0 5 , ▁the ▁sub ordinate ▁principal ities ▁had ▁taken ▁their ▁final ▁form ▁as ▁the ▁Elect or ate ▁of ▁Han over ▁and ▁the ▁Princi p ality ▁of ▁Brun sw ick - W olf en b ütt el , ▁and ▁these ▁would ▁become ▁the ▁Kingdom ▁of ▁Han over ▁and ▁the ▁Duch y ▁of ▁Brun sw ick ▁after ▁the ▁Congress ▁of ▁Vienna ▁in ▁ 1 8 1 5 . ▁ ▁Princi p ality ▁of ▁Brun sw ick - W olf en b ütt el ▁In ▁ 1 2 6 9 ▁the ▁Princi p ality ▁of ▁Brun sw ick ▁was ▁formed ▁following ▁the ▁first ▁division ▁of ▁the ▁Duch y ▁of ▁Brun sw ick - L ü ne burg . ▁In ▁ 1 4 3 2 , ▁as ▁a ▁result ▁of ▁increasing ▁t ensions ▁with ▁the ▁towns folk ▁of ▁Brun sw ick , ▁the ▁Brun sw ick ▁Line ▁moved ▁their ▁residence ▁to ▁Wolf en b ütt el ▁Castle , ▁thus ▁the ▁name ▁Wolf en b ütt el ▁became ▁the ▁uno fficial ▁name ▁of ▁this ▁princip ality . ▁With ▁Ivan ▁VI ▁of ▁Russia ▁the ▁Brun sw ick ▁line ▁even ▁had ▁a ▁short