Given the following context:

The area where Tulsa now exists was considered Indian Territory when it was first formally settled by the Lochapoka and Creek tribes in 1836. They established a small settlement under the Creek Council Oak Tree at the present day intersection of Cheyenne Avenue and 18th Street. This area and this tree reminded Chief Tukabahchi and his small group of the Trail of Tears survivors of the bend in the river and their previous Creek Council Oak Tree back in the Talisi, Alabama area. They named their new settlement Tallasi, meaning "old town" in the Creek language, which later became "Tulsa". The area around Tulsa was also settled by members of the other so-called "Five Civilized Tribes" who had been relocated to Oklahoma from the Southern United States. Most of modern Tulsa is located in the Creek Nation, with parts located in the Cherokee and Osage Nations.
Although Oklahoma was not yet a state during the Civil War, the Tulsa area saw its share of fighting. The Battle of Chusto-Talasah took place on the north side of Tulsa and a number of battles and skirmishes took place in nearby counties. After the War, the tribes signed Reconstruction treaties with the federal government that in some cases required substantial land concessions. In the years after the Civil War and around the turn of the century, the area along the Arkansas River that is now Tulsa was periodically home to or visited by a series of colorful outlaws, including the legendary Wild Bunch, the Dalton Gang, and Little Britches.

answer the following question:

What group of people named their new settlement Tallasi? 

Lochapoka