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Duchess of Buckingham is a title given to the wife of the Duke of Buckingham, an extinct title created several times, formerly in the Peerage of England and latterly in the Peerage of the United Kingdom. It was first created in 1444.

Duchesses of Buckingham

1st creation (1444)
2nd creation (1623)
3rd creation (1702)
4th creation (Buckingham and Chandos, UK 1822)