Guilherme is a distinctive boys' name in United States, ranking #7788 in 2021 with 10 recorded births. The name reached its all-time peak in 2006 with 39 births ranking #2896. Since 1996, the popularity has increased by 42.9%. In 2021, approximately 1 in every 174,824 boys born was named Guilherme. RISING Recent data shows the name is currently rising.