Wilhelm Moritz von Isenburg-Birstein was born 24 July 1657 in Offenbach to Johann Ludwig von Isenburg-Offenbach (1622-1685) and Luise von Nassau-Dillenburg (1623-1665) and died 8 March 1711 Birstein of unspecified causes. He married Anna Amalie zu Isenburg-Büdingen (1653-1700) 3 November 1679 in Birstein. He married Anna Ernestine Sophie von Quernheim (?-1708) 1700 . He married Wilhelmine Elisabeth von Leiningen-Dagsburg-Heidesheim (1659-1733) 1709 in Niederweisel.
Children
| Name | Birth | Death | Joined with |
| Ludwig Ernst von Isenburg-Birstein (1681-1682) | |||
| Ludwig Christoph von Isenburg-Birstein (1681-1681) | |||
| Wolfgang Ernst I. von Isenburg-Büdingen (1686-1754) | |||
| Wilhelm Moritz II. von Isenburg-Philippseich (1688-1772) | |||
| Adolf von Isenburg-Birstein (1689-1689) | |||
| Johann Philipp von Isenburg-Birstein (1696-1700) | |||
| Charlotte Luise von Isenburg-Birstein (1680-1739) | 13 July 1680 Büdingen, Hesse, Germany | 2 January 1739 Schaumburg, Lower Saxony, Germany | Viktor I. Amadeus Adolf von Anhalt-Bernburg-Schaumburg-Hoym (1693-1772) |
| Wilhelmine Magdalena von Isenburg-Birstein (1682-1749) | |||
| Christiane von Isenburg-Birstein (1683-1757) | |||
| Ernestine von Isenburg-Birstein (1685-1737) | |||
| Friederike Emilie von Isenburg-Birstein (1687-1749) | |||
| Eleonore von Isenburg-Birstein (1689-1689) | |||
| Albertine von Isenburg-Birstein (1690-1691) | |||
| Karoline Henriette von Isenburg-Birstein (1690-1691) | |||
| Anna Sophie von Isenburg-Birstein (1691-1765) | |||
| Philippine von Isenburg-Birstein (1692-1693) | |||
Footnotes (including sources)
| ‡ General |