Ferdinand Wilhelm Ernst, 2nd Prince of Solms-Braunfels (8 February 1721 in Braunfels – 2 October 1783, ibid.)

He was the son of Frederick William, Prince of Solms-Braunfels (1696–1761) by his first wife Princess Magdalena Henrietta of Nassau-Weilburg (1691–1725).

Ferdinand Wilhelm Ernst was born in Braunfels, Solms-Braunfels as the first son and child of Frederick William, Count of Solms-Braunfels and his first wife Princess Magdalena Henriette of Nassau-Weilburg (1691–1725) daughter of Johann Ernst, Prince of Nassau-Weilburg.

On 24 August 1756 he married in Laubach, Countess Sophie Christine Wilhelmine of Solms-Laubach.

She was the first daughter and second child of Christian August, Count of Solms-Laubach and his first wife Princess Elisabeth of Isenburg und Büdingen zu Birstein daughter of the first Prince, Wolfgang Ernest I.