Countess María Tellez Alfonso de Meneses, Tizon - Disparity

Has anybody noticed the fact that María Tellez Alfonso de Meneses Tizón was born years after her parents were dead? There is another lady of the same name, but she was Portuguese and her husband was different (not Mosen Arnao de Solier). The Portuguese Maria lived roughly during the same period as the Spanish María. Does anyone know anything about this? Thank you in advance for your info.