Garren is of Norman origin, deriving from the Germanic elements 'gar' meaning spear and 'mann', signifying man. It was brought to England by the Normans during the 11th century conquest and has been used in various forms ever since. The name gained popularity as a given name in the United States during the mid-20th century, likely due to its strong, masculine sound.
The name Garren experienced a notable increase in popularity from the late 1970s onwards, peaking around the early to mid-1980s with over 30 births per year. However, it has since declined significantly, with fewer than 20 births per year recorded between 2005 and 2016, and consistently low numbers in recent years.