The name Liza is a girl's name of Hebrew origin. Liza and is often added to lists like Unique Vintage Names for Girls and discussed in our forums with posts like "A brother or sister for little Jack or Olivia".
From the experts:
Liza is still tied to Ms. Minnelli, who was named by her mother Judy Garland after a George Gershwin song. Step up to Eliza instead.