From Longman Dictionary of Contemporary Englishunder the aegis of somebody/somethingunder the aegis of somebody/something formalPROTECTwith the protection or support of a person or organization a refugee camp operating under the aegis of the UN → aegis
Examples from the Corpus
under the aegis of somebody/something• And under the aegis of the Duke, a powerful protector, Strayhorn was able to live an openly gay life.• The refugee camp operates under the aegis of the UN.• More often than not, racial themes enter the conversation of the YCs under the aegis of fun. 