Translation of "Tamara" in Portuguese

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

Eu não sabia que o Guilherme e a Tamara eram irmãos.

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

Tamara parecia uma alma penada porque andava sempre só, cabisbaixa, melancólica.