Macarthur is a distinctive boys' name in United States, ranking #5173 in 2012 with 18 recorded births. The name reached its all-time peak in 1997 with 18 births ranking #3826. Since 1996, the popularity has increased by 63.6%. In 2012, approximately 1 in every 105,368 boys born was named Macarthur. FALLING Recent data shows the name is currently falling.