Guilherme is a distinctive boys' name in United States, ranking #3398 in 2007 with 32 recorded births. The name reached its all-time peak in 2006 with 39 births ranking #2896. Since 1996, the popularity has increased by 357.1%. In 2007, approximately 1 in every 64,851 boys born was named Guilherme. RISING Recent data shows the name is currently rising.