Malachy is a distinctive boys' name in United States, ranking #3866 in 2010 with 27 recorded births. This places Malachy in the top 27% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2002 with 35 births ranking #2732. In 2010, approximately 1 in every 71,052 boys born was named Malachy. FALLING Recent data shows the name is currently falling.