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'''De Lannoy''' or '''Delannoy''' is a surname, and may refer to;
;Noble Belgian [[Lannoy family|House of Lannoy]]:
* [[Jean de Lannoy]]
* [[Baldwin of Lannoy]]
* [[Hugo van Lannoy]]
* [[Guillebert de Lannoy]], soldier, traveller and diplomat
* [[Charles de Lannoy, 1st Prince of Sulmona]]: soldier and statesman
* [[Philip de Lannoy, 2nd Prince of Sulmona]], military leader
* Countess [[Stéphanie de Lannoy]], now the Hereditary Grand Duchess of Luxembourg
;Others
* [[Albert Delannoy]], long jumper
* [[Colinet de Lannoy]], composer
* [[Eustachius De Lannoy]], naval commander
* [[Henri Delannoy]] (1833–1915), French military officer and amateur mathematician
* [[Jean Delannoy]], actor and film director
* [[Louis De Lannoy]], cyclist
* {{ill|Luc Delannoy|es}}, writer and philosopher
* [[Marcel Delannoy]] (1898–1962), French composer
* [[Claire Delannoy]], French writer
* [[Robert Delannoy]], World War I [[flying ace]]
* [[Sandra Delannoy]], French politician
==See also==
*[[Delano family]]
* [[Delannoy number]]s, a mathematical sequence named after Henri Delannoy
* [[Delaunay]]
* [[Delone (disambiguation)]]
* [[Lannoy (disambiguation)]]
{{surname}}
[[Category:French-language surnames]]