Biography
Joachim Ernst I. von Schleswig-Holstein-Sonderburg-Plön was born 29 August 1595 in Sønderborg to John II von Schleswig-Holstein-Sonderburg-Plön (1545-1622) and Agnes Hedwig von Anhalt (1573-1616) and died 5 October 1671 Plön of unspecified causes. He married Dorothea Auguste von Schleswig-Holstein-Gottorf (1602-1682) 12 May 1633 in Gottorf Castle.
Children
| Name | Birth | Death | Joined with |
| Johann Adolf von Schleswig-Holstein-Sonderburg-Plön (1634-1704) | 8 April 1634 Ahrensbök, Schleswig-Holstein, Germany | 2 July 1704 Bösdorf, Schleswig-Holstein, Germany | Dorothea Sophie von Braunschweig-Wolfenbüttel (1653-1722) |
| August von Schleswig-Holstein-Sonderburg-Plön-Norburg (1635-1699) | 9 May 1635 Sønderborg, Denmark | 17 September 1699 | Elisabeth Charlotte von Anhalt-Harzgerode (1647-1723) |
| Ernestine von Schleswig-Holstein-Sonderburg-Plön (1636-1696) | |||
| Joachim Ernst II. von Schleswig-Holstein-Sonderburg-Plön (1637-1700) | |||
| Bernhard von Schleswig-Holstein-Sonderburg-Plön (1639-1676) | |||
| Agnes Hedwig von Schleswig-Holstein-Sonderburg-Plön (1640-1698) | |||
| Karl Heinrich von Schleswig-Holstein-Sonderburg-Plön (1642-1655) | |||
| Sofie Eleonore von Schleswig-Holstein-Sonderburg-Plön (1644-1689) | |||
Footnotes (including sources)
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