Joshau is a distinctive boys' name in United States, ranking #7998 in 1998 with 7 recorded births. This places Joshau in the bottom 29% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1999 with 8 births ranking #7492. Since 1996, the popularity has increased by 40.0%. In 1998, approximately 1 in every 273,045 boys born was named Joshau. FALLING Recent data shows the name is currently falling.