Conversation so far:
Were the kingdoms run by men or women?
Prince Vijaya and his 700 followers left Suppāraka.
What did Prince Vijaya and his followers do when they arrived in Sri Lanka?
Prince Vijaya and his 700 followers landed near modern-day Mannar, and founded the Kingdom of Tambapanni.
Were there other Sri Lankan rulers besides Prince Vijaya?
Sumitta succeeded his father as king of his country.
What are some interesting facts about the Early Sinhalese kingdoms?
Upatissa Nuwara was named after the regent king Upatissa.

Question: How many kingdoms were there?
Self-contained rewrite: How many kingdoms were there in ancient Sri Lanka?