Mr. Dudley was a descendant of both Thomas Dudley (1576–1653), of the Massachusetts Bay Corporation, and second governor of the Massachusetts Bay Colony; and Henry II of England (1133–1189) and Eleanor of Aquitaine (1122–1204).
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Leopold's brother Marc Eidlitz was the founder of a major construction firm, Marc Eidlitz & Son Builders N.Y.C. in New York, which built the St. Regis Hotel and many other projects.
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Their eldest son, Cyrus Lazelle Warner Eidlitz (1853–1921), named after his maternal grandfather, also became an architect.
Leopold II of Belgium | Leopold Stokowski | Léopold Sédar Senghor | Leopold II | Leopold I, Holy Roman Emperor | Leopold I of Belgium | Leopold Auer | Leopold III of Belgium | Order of Leopold | Leopold Mozart | Leopold II, Holy Roman Emperor | Leopold I | Leopold Bloom | Leopold von Ranke | Leopold III, Duke of Austria | Leopold | Aldo Leopold | Order of Leopold (Belgium) | Leopold Zunz | Leopold Wenzel | Leopold, Victoria | Leopold Kronecker | Leopold Hager | Jason Leopold | Archduke Leopold Wilhelm of Austria | Order of Leopold (Austria) | Leopold von Sacher-Masoch | Leopold Moczygemba | Leopold IV, Prince of Lippe | Léopold I of Belgium |
He was the son of Lazelle Warner and influential New York architect Leopold Eidlitz, one of the founders of the American Institute of Architects.
His brother Leopold Eidlitz was a well-known architect, as was Leopold's son, Cyrus L. W. Eidlitz.