The new settlement was named in honor of General Mariano Necochea, a military commander during Argentine War of Independence. Founded on a seaside estate owned by Eustoquio Díaz Vélez, jr., the latter's father, General Eustoquio Díaz Vélez, had likewise played an important role during the struggle.
The new town was named after General Mariano Necochea, a key military figure in Argentina's fight for independence. Similarly, the area where it was founded had been owned by Eustoquio Díaz Vélez, sr., and his son, General Eustoquio Díaz Vélez, also played a crucial role in the country's struggle.