Guilherme is a distinctive boys' name in United States, ranking #6811 in 2015 with 12 recorded births. The name reached its all-time peak in 2006 with 39 births ranking #2896. Since 1996, the popularity has increased by 71.4%. In 2015, approximately 1 in every 159,688 boys born was named Guilherme. RISING Recent data shows the name is currently rising.