Unknown is a distinctive boys' name in United States, ranking #1806 in 2018 with 85 recorded births. The name reached its all-time peak in 2009 with 113 births ranking #1484. Since 1996, the popularity has increased by 60.4%. In 2018, approximately 1 in every 21,359 boys born was named Unknown. FALLING Recent data shows the name is currently falling.