Jak is of Slavic origin, derived from the Hebrew 'Yaakov'. It means 'supplanter' and was traditionally given to the second-born son. Popularized by American author C.S. Lewis in his 'Chronicles of Narnia' series with the character Jack/Jaq, it has gained international recognition.
The name Jak saw a significant increase in popularity between 2006 and 2008, with births nearly tripling from 18 to 51 during this period. However, it has since stabilized around the mid-20s per year. The highest number of births recorded was in 2021, with 32 occurrences.