Simplify the following text for a Grade 3 native English-speaking person.
Original: SÃ # o CristÃ vÃ # o was the site of the first settlement by the Portuguese , in 1591 at Sergipe D'El-Rey , what is today Sergipe ( the name Sergipe is actually a Tupi word , meaning river of `` crab '' ) , becoming the state 's capital .
Simplified: The first people to live in Sergipe were from the Tupi Tribe . The name `` Sergipe '' is the Tupi word for crab .