* Russian: Lena is a popular name in Russia, derived from the name Elena, which comes from the Greek word "Helene," meaning "torch" or "light."
* German: Lena is also a German name, again derived from Elena.
* Latin: Lena can also be seen as a short form of the Latin name Helena, which is a variation of the Greek name.
Therefore, the nationality associated with the name Lena is not definitive and can depend on the specific context or origin of the individual.