ˌɔn ˈeɪt ˈɔːɡəst wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd fˈoːɹtiːn, pˈɑːnsɑːnbi mˈæɹid lˈeɪdi bˈɑːɹbɚɹə ˈæʃlikˈuːpɚ ðɪ ˈoʊnli dˈɔːɾɚ ænd ˈɛɹ ʌvðə fˈɪfθ ˈɜːl ʌv ʃˈæftsbɛɹi ænd ɐ kˈoʊˈɛɹ ʌvðə mˈɛdɪˌiːvəl bˈæɹəni ʌv mˈɔːli, wˈʌn θˈaʊzənd sˈɛvənhˈʌndɹɪd ˈeɪɾi nˈaɪn wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd fˈoːɹɾi fˈoːɹ.
On 8 August 1814, Ponsonby married Lady Barbara Ashley-Cooper (the only daughter and heir of the 5th Earl of Shaftesbury and a co-heir of the medieval Barony of Mauley, 1789–1844).