Johnwilliam is a distinctive boys' name in United States, ranking #6791 in 1999 with 9 recorded births. The name reached its all-time peak in 2010 with 13 births ranking #6532. Since 1996, the popularity has increased by 80.0%. In 1999, approximately 1 in every 213,343 boys born was named Johnwilliam. FALLING Recent data shows the name is currently falling.