Alexander,

Duke Duke is a male title either of a monarch ruling over a duchy, or of a member of royalty, or nobility. As rulers, dukes are ranked below emperors, kings, grand princes, grand dukes, and sovereign princes. As royalty or nobility, they are ran ...

Schleswig-Holstein-Sonderburg Schleswig-Holstein-Sonderburg was the name of a branch line of the House of Oldenburg as well as the name of their land. It existed from 1564 until 1668 and was a titular duchy under the King of Denmark, rather than a true territorial dukedom in ...

, (20 January 157313 May 1627) was a Danish nobleman. Alexander was born in

Sønderborg (; german: Sonderburg ) is a Danish town in the Region of Southern Denmark. It is the main town and the administrative seat of Sønderborg Municipality (Kommune). The town has a population of 27,766 (1 January 2022),Schleswig The Duchy of Schleswig ( da, Hertugdømmet Slesvig; german: Herzogtum Schleswig; nds, Hartogdom Sleswig; frr, Härtochduum Slaswik) was a duchy in Southern Jutland () covering the area between about 60 km (35 miles) north and 70 km ...

, the third son of

John II, Duke of Schleswig-Holstein-Sonderburg John the Younger or John of Denmark ( da, Hans; german: Johann; 25 March 1545 – 9 October 1622) was the Duke of Schleswig-Holstein-Sonderburg. Biography John was born on 25 March 1545 in Haderslev in the Duchy of Schleswig as the fourth chi ...

and

Elisabeth of Brunswick-Grubenhagen Elizabeth of Brunswick-Grubenhagen (20 March 1550 – 11 February 1586) was the first wife of Duke John of Schleswig-Holstein-Sonderburg, the son of King Christian III of Denmark. Family Elisabeth was born on 20 March 1550. She was the only ...

. Because his elder surviving brother chose

Ærø Ærø () is one of the Danish Baltic Sea islands, and part of the Southern Denmark Region. Since 1 January 2006 the whole of Ærø has constituted a single municipality, known as Ærø Kommune. Before that date, there were two municipalities o ...

as his seat, Alexander received Sønderborg upon their father's death and was in practice its second duke. Alexander died in Sønderborg.

Marriage and issue

Alexander married

Dorothea of Schwarzburg-Sondershausen Dorothea (also spelled Dorothée, Dorotea or other variants) is a female given name from Greek (Dōrothéa) meaning "God's Gift". It may refer to: People * Dorothea Binz (1920–1947), German concentration camp officer executed for war cri ...

, daughter of

John Günther I, Count of Schwarzburg-Sondershausen John Günther I of Schwarzburg-Sondershausen (also known as ''Hans Günther'' or ''Johann Günther''; 20 December 1532 in Sondershausen – 28 October 1586 in Arnstadt) was the co-ruler of Schwarzburg from 1552 until 1571 and the sole ruler Sc ...

, on 26 November 1604 in

Oldenburg Oldenburg may also refer to: Places *Mount Oldenburg, Ellsworth Land, Antarctica *Oldenburg (city), an independent city in Lower Saxony, Germany **Oldenburg (district), a district historically in Oldenburg Free State and now in Lower Saxony *Olde ...

. They had eleven children: * John Christian (26 April 1607 – 28 June 1653) * Alexander Henry (12 September 1608 – 5 September 1657) * Ernest Günther (14 October 1609 – 18 January 1689) * George Frederick (18 December 1611 – 23 August 1676) * August Philipp (11 November 1612 – 6 May 1675) * Adolph (2 November 1613 – 1 February 1616), died young * Anna Elisabeth (5 February 1615 – 19 February 1616), died young * William Anton (2 April 1616 – 2 April 1616), died soon after birth * Sophie Katharina (28 June 1617 – 22 November 1696), wife of

Anthony Günther, Count of Oldenburg Anthony Günther, Count of Oldenburg (aka Anton Günther, 10 November 158319 June 1667) was an Imperial Count and a member of the House of Oldenburg Günther was born in Oldenburg and was the ruling count of Oldenburg from 1603 until his death i ...

* Eleonore Sabine (27 February 1619 – 27 February 1619), died soon after birth * Philip Louis (27 October 1620 – 10 March 1689)

Ancestors

1573 births 1627 deaths Dukes of Germany House of Oldenburg in Schleswig-Holstein People from Augustenborg, Denmark {{Germany-duke-stub