Guilherme is a distinctive boys' name in United States, ranking #5576 in 2010 with 16 recorded births. This places Guilherme in the top 39% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2006 with 39 births ranking #2896. Since 1996, the popularity has increased by 128.6%. In 2010, approximately 1 in every 119,901 boys born was named Guilherme. RISING Recent data shows the name is currently rising.