Ambrosio Bernardo O'Higgins y O'Higgins, 1st Marquess of Osorno born Ambrose Bernard O'Higgins, was an Irish-Spanish colonial administrator and a member of the O'Higgins family.
- Occupation
- military personnel, politician, governor, merchant
- Position held
- Viceroy of Peru, Royal Governor of Chile
- Citizenship
- Ireland, Spain
- Born
- February 13, 1720
- Died
- March 19, 1801