Macarthur is a distinctive boys' name in United States, ranking #4926 in 1999 with 14 recorded births. The name reached its all-time peak in 1997 with 18 births ranking #3826. Since 1996, the popularity has increased by 27.3%. In 1999, approximately 1 in every 137,149 boys born was named Macarthur. FALLING Recent data shows the name is currently falling.