Guilherme is a distinctive boys' name in United States, ranking #4417 in 2011 with 22 recorded births. The name reached its all-time peak in 2006 with 39 births ranking #2896. Since 1996, the popularity has increased by 214.3%. In 2011, approximately 1 in every 86,318 boys born was named Guilherme. RISING Recent data shows the name is currently rising.