Surname Ponsonby (Ponsonby 
) , in all the world, is a rare cognomen. The surname Ponsonby is habitual in Ireland, where it is quite a rare surname, Cyprus, and Jamaica. Not in comparison with a country's population, it most frequently occurs in the United Kingdom, Australia, and the United States.
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| Ponsonby | Australia, South Africa, Ireland, United Kingdom, United States |
| john ponsonby Peerage person ID=140179 (b. 1529) |
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| william ponsonby London publisher of the Elizabethan era (b. 1540) |
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| simon ponsonby Peerage person ID=140178 (b. 1557) |
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| henry ponsonby (1580-1622) (b. 1580) |
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william ponsonby, 2nd earl of bessborough politician in Britain and Ireland (1704-1793), GB (b. 1704) |
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| william ponsonby, 1st viscount duncannon Irish politician (b. 1659) |
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john ponsonby Irish politician (1713-1787) (b. 1713) |
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| henry ponsonby Irish politician (b. 1685) |
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catherine ponsonby British duchess, wife of the 5th Duke of St Albans (b. 1742) |
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william ponsonby, 1st baron ponsonby British politician, IE (b. 1744) |
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| letitia ponsonby (born 1701) (b. 1701) |
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sarah ponsonby younger of the two Ladies of Llangollen, GB (b. 1755) |
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george ponsonby British politician (b. 1755) |
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frances ponsonby (1757-1827) (b. 1757) |
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frederick, earl of bessborough ponsonby British peer (1758-1844), GB (b. 1758) |
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