Klever likely comes from the German surname Klever or is a word-name echoing clever.
Klever is a variant of the name Kleber (also spelled Cleber), which traces its roots to the German word for clover — *Klee* — or alternatively to an Old High German term meaning adhesive or binding. The name gained historical prominence through Jean-Baptiste Kléber, the audacious French general who served under Napoleon Bonaparte and distinguished himself during the Egyptian campaign before his assassination in Cairo in 1800.
His military legacy cemented the name in French and German memory. In Brazil, the Portuguesized form Cleber became a fashionable given name throughout the twentieth century, particularly in working-class and northeastern communities, where it was embraced for its strong, modern sound. The Klever spelling, with its Germanic fidelity, adds a visual sharpness that also winks at the English word clever, lending the name a double connotation of botanical rootedness and intellectual brightness. Today Klever is rare enough to feel distinctive yet carries the quiet weight of this layered European history.