lord bessborough married lady frances lambton, eldest daughter of john lambton, 1st earl of durham, on 8 september 1835. she died on 18 december 1835, and on 4 october 1849, he married lady caroline gordon-lennox, eldest daughter of charles gordon-lennox, 5th duke of richmond. there were no children from the two marriages. he died in january 1880, aged 70, and was succeeded by his younger brother frederick.