All Blacks hooker Dane Coles has revealed his wife gave birth to their second son last week.

Coles is preparing for the All Blacks third test of their end-of-year tour when they take on Ireland in Dublin on Sunday.

Coles told media in Dublin overnight that his wife Sarah gave birth last Thursday. They have named the boy Reef Nicholas Coles. The couple also have a two-year-son called Jax.

"I have kept that pretty quiet, she had a boy last Thursday," Coles said.

Advertisement

"It is all good. A bit of a scare with the earthquakes. She is pretty busy with no sleep and another two-year-old running around, keeping her crazy.

"He is healthy and keeping mum awake. So I am in the bad books until I get home."