Maciej is a moderately popular boys' name in England & Wales, ranking #471 in 2008 with 75 recorded births. This places Maciej in the top 8% of ranked UK boys' names for the year. Its actual usage is classified as Moderately Popular. The name reached its all-time peak in 2008 with 75 births ranking #471. In 2008, approximately 1 in every 4,525 boys born was named Maciej. FALLING Recent data shows the name is currently falling.