Macarthur is a distinctive boys' name in United States, ranking #8744 in 2008 with 9 recorded births. The name reached its all-time peak in 1997 with 18 births ranking #3826. Since 1996, the popularity has decreased by 18.2%. In 2008, approximately 1 in every 226,661 boys born was named Macarthur. FALLING Recent data shows the name is currently falling.