Isak is of Scandinavian origin, meaning 'he who laughs' in Hebrew. It's a variant spelling of Isaac, derived from the biblical figure who was the promised son of Abraham and Sarah. In Norway and Sweden, Isak has been a popular choice for boys since the mid-20th century.
The name Isak experienced a significant rise in popularity between the late 1990s and early 2000s, with over 57 births recorded annually from 2004 to 2006. However, since then there has been a consistent decline in its usage, with only 14 births recorded in 2022. Overall, the name Isak has seen a total of 1042 births between 1979 and 2023.