| William | |
| Prince of Solms-Braunfels | |
| House: | House of Solms-Braunfels |
| Father: | Ferdinand William Ernest, Prince of Solms-Braunfels |
| Mother: | Countess Sophie of Solms-Laubach |
| Spouse: | Wild- und Rheingräfin Auguste of Salm-Grumbach Elisabetha Becker |
| Birth Date: | 9 January 1759 |
| Birth Place: | Braunfels |
| Death Place: | Braunfels |
| Signature: | Fuerst Wilhelm zu Solms-Braunfels Autograph 1813.PNG |
Wilhelm Christian Karl, 3rd Prince of Solms Braunfels (9 January 1759, in Braunfels – 20 March 1837, in Braunfels) was by succession an immediate Prince, then a nobleman and head of the Princely House of Solms-Braunfels, a Prussian major general and Hessian deputy.
William was a member of the Princely House of Solms-Braunfels. His grandfather Frederick William (1696–1761) was the first Prince of Solms-Braunfels. His parents were the imperial colonel and lieutenant general of the United Provinces Ferdinand Wilhelm Ernst (1721–1783) and Countess Sophie Christine Wilhelmine of Solms-Laubach. first daughter and second child of Christian August, Count of Solms-Laubach. Prussian Major General Frederick William (1770–1814) was one of his younger brothers.
On 6 October 1792, he married Wild- und Rheingräfin Auguste of Salm-Grumbach (1771–1810) half-sister of Friedrich, Prince of Salm-Horstmar.[1] They had four children:
By his maitresse Anna Elisabeth Becker (1779–1852), whom he married morganatically once widower, he had three children who received patronymic Wilhelmi[2]