Guilherme is a distinctive boys' name in United States, ranking #3245 in 2008 with 35 recorded births. The name reached its all-time peak in 2006 with 39 births ranking #2896. Since 1996, the popularity has increased by 400.0%. In 2008, approximately 1 in every 58,284 boys born was named Guilherme. RISING Recent data shows the name is currently rising.