firstborn / eldest child
primogeniti
pree-moh-JEH-nee-toh
Primogenito (firstborn) is still used. In Italian inheritance and naming traditions, the firstborn child often receives a grandparent's name. 'Figlio maggiore' (eldest child) and 'figlio minore' (youngest) are also common.
Il primogenito porta il nome del nonno paterno.
The firstborn bears the paternal grandfather's name.
Da primogenita, ho sempre avuto più responsabilità.
As the firstborn, I always had more responsibilities.