7 9 9 – 1 8 4 8 ) ▁m . ▁Joseph , ▁Duke ▁of ▁Sax e - Al ten burg ▁ ▁Princess ▁Elisabeth ▁of ▁Sax e - Al ten burg ▁( 1 8 2 6 – 1 8 9 6 ) ▁m . ▁Peter ▁II , ▁Grand ▁Duke ▁of ▁Old enburg ▁ ▁Frederick ▁August us ▁II , ▁Grand ▁Duke ▁of ▁Old enburg ▁( 1 8 5 2 – 1 9 3 1 ) ▁m . ▁Duch ess ▁Elisabeth ▁Alexand r ine ▁of ▁Me ck len burg - Sch wer in ▁ ▁Nikol aus , ▁Her edit ary ▁Grand ▁Duke ▁of ▁Old enburg ▁( 1 8 9 7 – 1 9 7 0 ) ▁m . ▁Princess ▁Hel ena ▁of ▁Wal deck ▁and ▁Py rm ont ▁– ▁pret ender ▁ ▁Anton - G ün ther , ▁Duke ▁of ▁Old enburg ▁( 1 9 2 3 – 2 0 1 4 ) ▁m . ▁Princess ▁Am eli ▁of ▁Lö wen stein - W ert heim - Fre ud enberg ▁- ▁pret ender ▁ ▁Christian , ▁Duke ▁of ▁Old enburg ▁( 1 9 5 5 -) ▁m . ▁Count ess ▁Caroline ▁zu ▁R ant z au ▁- ▁pret ender ▁Anton - G ün ther ▁is ▁also ▁desc ended ▁from ▁F ris o ' s ▁son ' s ▁daughter ▁through ▁his ▁mother ▁in ▁two ▁ways : ▁ ▁Same ▁as ▁# 1 ▁above ▁ ▁Same ▁as ▁# 2 ▁above ▁ ▁Same ▁as ▁# 3 ▁above ▁ ▁Frederick ▁William , ▁Prince ▁of ▁N ass au - We il