Leller is of German origin, derived from the occupational surname 'Lehler', which was given to a leatherworker or tanner. The name has also been found in other European countries such as France and Belgium, suggesting a broader spread beyond Germany. The popularity of Leller is not widely documented due to its rarity, but it's considered an uncommon yet unique choice for a given name.
"The name Leller was consistently used for five girls born each year in 1916 and 1924."