The Collaborative International Dictionary of English v.0.48:

Lena \Le"na\ (l[=e]"n[.a]), n. [L.]
   A procuress. --J. Webster.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Lena
    n 1: a Russian river in Siberia; flows northward into the Laptev
         Sea [syn: Lena, Lena River]