Guilherme is a distinctive boys' name in United States, ranking #4573 in 2002 with 17 recorded births. The name reached its all-time peak in 2006 with 39 births ranking #2896. Since 1996, the popularity has increased by 142.9%. In 2002, approximately 1 in every 114,204 boys born was named Guilherme. RISING Recent data shows the name is currently rising.