Mikolaj is a moderately popular boys' name in England & Wales, ranking #328 in 2010 with 133 recorded births. This places Mikolaj in the top 5% of ranked UK boys' names for the year. Its actual usage is classified as Moderately Popular. The name reached its all-time peak in 2016 with 146 births ranking #322. In 2010, approximately 1 in every 2,603 boys born was named Mikolaj. FALLING Recent data shows the name is currently falling.