Translation of "Tamara" in Spanish

I didn't know Guillermo and Tamara were brother and sister.

No sabía que Guillermo y Tamara eran hermanos.

Tamara seemed like a soul in despair since she was always lonely, downcast, and melancholic.

Tamara parecía un alma en pena porque andaba siempre sola, cabizbaja, melancólica.