Guilherme is a distinctive boys' name in United States, ranking #5879 in 2016 with 15 recorded births. The name reached its all-time peak in 2006 with 39 births ranking #2896. Since 1996, the popularity has increased by 114.3%. In 2016, approximately 1 in every 126,481 boys born was named Guilherme. RISING Recent data shows the name is currently rising.