Being your fiend Cuban, it is most probable that her name is a combination of
Jane and
Lis (short form of
Elisabeth) or plain made up. Latin American people are well known for using made-up, combined or creative names, adapted from whatever language to Spanish. It may be because of the diverse influence of other cultures they get, but who knows....
I will assume it is pronounced yuh-neh-LIZ and it is a combination of
Jane and
Lis, so click on the links and get your meaning!