In the entire world, Kleene (Kleene 
) is a very rare epicene forename. The given name Kleene is habitual in Germany, where it is a very rare female name, and China, where it is an extremely rare male name. More frequently, Kleene is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Kleene | Netherlands, Brazil, United States, China, Germany |
| lammie kleene Lammie Kleene, female teacher at the Zuiderschool (Giethoorn, the Netherlands) during 1950-19XX, NL |
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