This is the 322nd most frequent Spanish word.
llamado
"Called" or "named."
Here 'llamado' is used as a past participle adjective to describe the name given to the person, effectively meaning 'named'.
El escritor llamado Mario Vargas Llosa es muy influyente.
The writer named Mario Vargas Llosa is very influential.
'Llamado' acts as a descriptor for the event's given name, functioning as 'called'.
Hay un evento llamado 'La Fiesta del Sol' en junio.
There is an event called 'The Festival of the Sun' in June.
In this context, 'llamado' is a passive past participle, indicating that the child was called by the mother.