Guilherme is a distinctive boys' name in United States, ranking #7569 in 1997 with 7 recorded births. This places Guilherme in the bottom 30% 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. In 1997, approximately 1 in every 269,299 boys born was named Guilherme. RISING Recent data shows the name is currently rising.