Rudolf is a distinctive boys' name in United States, ranking #7542 in 2005 with 10 recorded births. This places Rudolf in the bottom 44% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1998 with 14 births ranking #4824. In 2005, approximately 1 in every 199,715 boys born was named Rudolf. FALLING Recent data shows the name is currently falling.