Sir Polydore de Keyser (13 December 1832 - 14 January 1898), was a lawyer and the first Roman Catholic since the Reformation to be elected Lord Mayor of London (October 1887 - November 1888). He was born in the Belgian city of Dendermonde, near Ghent, Belgium.
Sheriff of London and Middlesex 1882.
Lord Mayor of London 1887
Article in Wikipedia [1] and some further information here and here.