Blu is an uncommon, unisex given name of uncertain origin. It gained some popularity in the late 20th century, likely due to its association with blue, a color often symbolizing calmness and tranquility. In English-speaking cultures, Blu is sometimes used as a nickname for people named Blue or as an alternative spelling to the traditional Blue.
"The name Blu experienced a significant increase in popularity from the late 2010s onwards, with a notable spike in recent years, reaching 48 births in 2021 and 47 in 2023."