Demetrius is a moderately popular boys' name in United States, ranking #364 in 1997 with 679 recorded births. The name reached its all-time peak in 1996 with 759 births ranking #338. Since 1996, the popularity has decreased by 10.5%. In 1997, approximately 1 in every 2,776 boys born was named Demetrius. FALLING Recent data shows the name is currently falling.