Rilla is a distinctive girls' name in United States, ranking #17813 in 2003 with 5 recorded births. This places Rilla in the bottom 3% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2020 with 15 births ranking #7494. In 2003, approximately 1 in every 365,410 girls born was named Rilla. FALLING Recent data shows the name is currently falling.