The concept of doing something "under someone's aegis" means doing something under the protection of a powerful, knowledgeable, or benevolent source. The word aegis is identified with protection by a strong force with its roots in Greek mythology.
Aegis - protection, sponsorship, patronage, guidance
The word aegis is a noun. It is a mythological shield.
ae
Your theatrum mundi ate my aegis tuesday.
sus-: less or under
Under the support, protection or backing of someone.
Aegis - protection, sponsorship, patronage, guidance
it means to follow laws
The Emperor was under the aegis of his bodyguards.
Aegis was the Greek word for "shield". The AEGIS system is a system that is designed to shield the ship.
I did a search hoping to find evidence of the word "aegis" being used without being embedded in prepositional phrase that begins "under the;" however, I found none. Here's an example sentence in which the word means "protection": "Popular actors travel under the aegis of bodyguards to protect them from rabid paparazzi." Here's one from Sadlier-Oxford Vocabulary Workshop (New Edition), Level H, Unit 2: "The arts and education programs of the United Nations are under the aegis of UNESCO." In the foregoing case, the word means "patronage" or "sponsorship." Another example: Jane Doe is studying under the aegis of the Empress. (This suggests she enjoys the protection of the latter, who is presumably also paying her fees).
There is not a Roman name for Aegis
The Oracle of Delphi was a priestess who made predictions about the future under the aegis of the god Apollo.
The Aegis - magazine - ended in 1818.
Aegis - newspaper - was created in 1886.
Aegis Trust was created in 2000.
Aegis Group was created in 1968.