Unknown is a distinctive boys' name in United States, ranking #1932 in 2019 with 77 recorded births. The name reached its all-time peak in 2009 with 113 births ranking #1484. Since 1996, the popularity has increased by 45.3%. In 2019, approximately 1 in every 23,290 boys born was named Unknown. FALLING Recent data shows the name is currently falling.