The surname Claber turns up at beginning of the 18th. century in the Lower-Rhine area of Germany. Around 1850 this name was gradually written as Klaber. Also in Hungary/Austria the name Klaber turns up in the 19th. century.
- Although there is a small village in North Germany, called Klaber (near Gustrow, Mecklenburg-Vorpommern), there are no indications people used Klaber being their hometown for their surname.
- Another possibility is the use of the name of a profession such as the "Kleiber", a brick-layer or mason. However, Jews would not have been working in the mason profession as they were barred from this profession and that would make this origin of the name for Jews very unlikely.
- It has been suggested that the clover plant ('Klee' in German and 'klaver' in Dutch) could have been used for the name as the four leaf plant was a rarity and would bring luck.