Martin Du Bellay, Sieur de Langey (1495–1559) was a French nobleman and chronicler, and Prince of Yvetot by marriage. His memoirs of the Italian Wars form one of the most significant primary sources for the period.
- Occupation
- memoirist, diplomat
- Position held
- lieutenant general
- Citizenship
- France
- Born
- 1495
- Died
- March 9, 1559