con sus familias

with their families

→ con
phrase Rare #41,202
with their families Sus can mean “their” or “your” when addressing more than one person or using formal usted forms. The phrase can describe going somewhere together with one's family.
SP: Los estudiantes llegaron con sus familias.
EN: The students arrived with their families.

Vayan con sus familias y disfruten la vida.

Go with your families and enjoy life.

Si queremos a los mejores científicos, tendrán que venir con sus familias.

If we want the best scientists, they will have to come with their families.

— Oppenheimer (2023)

En un momento como este, nadie sabe qué pasó con sus familias.

At a time like this, nobody knows what happened to their families.

— Train to Busan (2016)

Ustedes saben lo que sucede con sus familias.

You know what is happening with your families.

— Lazzaro feliz (2018)