Callen is a modern, unisex given name of recent origin. It has gained popularity due to its unique sound and spelling, appealing to parents seeking distinctive names for their children. The name Callen appears to have emerged in the late 20th century, with no clear historical or linguistic roots. It has not been associated with any particular culture or language, making it a truly global name choice. Despite its lack of tradition, Callen has been well-received and is currently ranked among the top 1000 names for both boys and girls in some countries, such as the United States.
"Callen seems to have been a popular name among parents from the late 80s onwards, with over 560 babies named Callen between 1983 and 2023. The peak of popularity was around 2020-2023, with a significant increase in births each year."