Briannon is a distinctive girls' name in United States, ranking #10368 in 2002 with 9 recorded births. This places Briannon in the bottom 43% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1998 with 11 births ranking #8084. In 2002, approximately 1 in every 199,647 girls born was named Briannon. FALLING Recent data shows the name is currently falling.