She was the 3rd Duchess of San Pietro in Galatina, 3rd Countess of Soleto and Princess of Bisignano.

Erina Castriota inherited her father's confiscated fiefs, including the Duchy of San Pietro in Galatina and the County of Soleto, following Ferdinand's exclusion from amnesty by Charles V after the Peace of Cambrai in 1530.

As part of her dowry when marrying Pietro Antonio Sanseverino, Erina brought these fiefs, a transfer recognized by Charles V. The official donation document referred to her as the "only-begotten legitimate and natural daughter," and outlined a dowry of twenty-five thousand ducats, with a portion payable at her marriage and the remainder upon Ferdinand's death, contingent on him having no male heirs.

Some, like Dufresne, assert that all his sons died without heirs, while others, such as Zazzera, believe Erina was the only child from his marriage to Adriana Acquaviva.

Erina's inheritance was likely due to her father's felony and the supposed death of any brothers without issue.