Coningsby was the eldest son of Fitzwilliam Conningsby, of Hampton Court, Herefordshire, and Cicely Nevill, daughter of Henry Nevill, 9th Baron Bergavenny.
[2] He supported the King and was disabled from sitting in parliament on 22 January 1644.
[3] In later life he is said to have suffered from mental health problems and to have died demented.
His son Thomas accused Ferdinando Gorges, a wealthy Barbadian merchant who had lent his father large sums of money, of exercising undue influence over him.
Notwithstanding this, Thomas married Gorges's daughter Barbara and had a number of children by her.