Sondes was the grandson of Sir Michael Sondes* and heir to extensive estates in Kent and Surrey.
In 1631 Sondes obtained a reversion to succeed (Sir) Thomas Fanshawe II* in the lucrative post of king’s remembrancer of the Exchequer; however, he may have sold it on as he never took up the office, either while Fanshawe was disbarred in 1641, or after his death.
Deeper tragedy struck in 1655, when the elder of Sondes’s two surviving sons, George, was murdered by the other, Freeman, who was subsequently sentenced to death, leaving Sondes childless. Disconsolate at this loss, it was perhaps in the hope of having further offspring that Sondes married again in the following year.
