Macarthur is a distinctive boys' name in United States, ranking #6188 in 2014 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 2014, approximately 1 in every 137,174 boys born was named Macarthur. FALLING Recent data shows the name is currently falling.