1. Britons: The Britons were the indigenous people of Britain, who had inhabited the region for thousands of years before the arrival of the Romans. They were a Celtic people, and their culture and traditions had a strong influence on Roman London.
2. Romans: The Romans were the ruling power in Britain from 43-410 CE, and they established Londinium (London) as their capital. Roman settlers, soldiers, traders, and administrators flocked to the city, making up a significant portion of the population.
3. Gauls: The Gauls were another Celtic people who had close connections with the Britons and the Romans. Many Gauls migrated to Britain during the Roman period, and they formed an important part of the population in London.
4. Germans: Germanic tribes, such as the Saxons, Angles, and Jutes, began raiding Britain in the 3rd and 4th centuries CE. Some of these tribes eventually settled in Britain, and they would later play a major role in shaping post-Roman London.
5. Jews: A Jewish community existed in Roman London from the 1st century CE onward. The Jews were mainly engaged in trade and commerce, and they had their own synagogues and religious practices.
6. Other Ethnic Minorities: In addition to these main groups, there were smaller communities of other ethnic minorities in Roman London, including Africans, Egyptians, Syrians, and Greeks. These communities added to the cosmopolitan nature of the city.
It is important to note that these groups of people did not live in isolation, but rather interacted and influenced one another. Their presence in Roman London contributed to the city's cultural diversity and vibrancy.