'New El Nino' discovered south of equator

El otro niño

El Oñin.

Since we often objectify the Global South: El Chico and La Chica.

El hermano

O mano. Brazilian turn to name it

El primo

La niña

El primo de nino

name's taken I'm afraid

You'd be surprised what else El Niño is used for.

tamaiti - a Maori name seems to be the obvious choice

Tasmanian Development

El Nino bravo!

Donde brilla el tibio sol!