it means they are referring to Antonia y manuel. son is the conjugated form of ser meaning they are. When you put a name or names in front, it just specifies who you are talking about.
Some common nicknames for the name Augustine are Gus, Auggie, and Augie.
The root word of "nicknames" is "name." A nickname is a shortened or alternative form of a person's name used informally, often given based on a characteristic or trait.
Some good nicknames for Liam could be Lee, L, or even M.
Common nicknames for the name Shayla include Shay, Shay-Shay, and Shae.
Antonia Putiloff goes by Antonia Putiloff.
Antonia Cardella goes by TJ (aka Antonia Zehler).
Antonia Jones goes by Toni.
Antonia Anderson goes by Toni.
Antonia Prebble goes by Toni.
Antonia Miller goes by Toni.
Antonia Moreno goes by La Toi.
Nathalie Antonia's birth name is Nathalie Antonia.
Antonia Franceschi's birth name is Antonia Franceschi.
Antonia Novello's birth name is Antonia Coello.
Antonia Rey's birth name is Antonia Francesch.
Antonia Jones's birth name is Antonia Maria Benyovszky.