What are three names that the city of Cairo is called?

Cairo has several nicknames and alternative names. Here are three of them:

1. Masr (or Misr) is the Arabic name for both Egypt and Cairo. It is the oldest and most commonly used name for the city, dating back to ancient Egyptian times. The name is thought to be derived from the Arabic word for "to build" or "to settle".

2. Al-Qahirah (The Victorious) is another common name for Cairo, dating back to the 10th century when the city was founded by the Fatimid dynasty. The name is said to have been chosen because the city was built on the site of a victorious battle against the rebellious Ikhshidid dynasty.

3. Umm ad-Dunya (Mother of the World) is a poetic nickname for Cairo that emphasizes the city's importance and influence. It is often used in Egyptian literature and poetry to express the city's significance as a center of culture, trade, and politics.