Unknown is a distinctive boys' name in United States, ranking #1882 in 2014 with 78 recorded births. The name reached its all-time peak in 2009 with 113 births ranking #1484. Since 1996, the popularity has increased by 47.2%. In 2014, approximately 1 in every 24,621 boys born was named Unknown. FALLING Recent data shows the name is currently falling.