Former TVNZ presenter Tāmati Coffey and partner Tim Smith reveal their newborn son's name!

A week after welcoming his first baby with partner Tim Smith, Rotorua-based Waiariki MP Tāmati Coffey has revealed the newborn's name.

Announcing the news on Instagram, the proud dad wrote: "Hey Son. We toiled over your name. We’ve told the tribe, we’ve done your numbers and we’ve come up with ten good reasons why your name should be so."

"Kia kaha. Kia ū. Kia manawanui."

The couple's son would be named Tūtānekai Smith-Coffey.

Tūtānekai is the subject of a Te Arawa legend.

The story of Tūtānekai and Hinemoa, according to Te Ara, The Encyclopedia of New Zealand, is that the pair married against the wishes of Hinemoa's people.

Hinemoa lived on the mainland of Rotorua while Tūtānekai lived on Mokoia Island in the middle of Lake Rotorua.

Tūtānekai and his three older half-brothers had fallen in love with Hinemoa but she married Tūtānekai after swimming to Mokoia Island guided by the music of the flute he played.

He is described as a handsome young man, a fine dancer and athlete.

Earlier this year, Coffey announced the exciting news at Auckland's Big Gay Out.

"I wanted to seize this opportunity, at the biggest gay event in the country right now, to share the news that me and my partner over there are expecting a baby in July," he told the crowd.

Coffey, 40, said it had been a long time coming.

"If ever there was a perfect time, I think now is a really good time," he said.

"I hope that I get to celebrate that with all other kinds of modern families out there."

Tāmati and his partner, Tim.

Before revealing the news, the Labour MP said: "What I love about Big Gay Out is this is a day where we all come together, all types of people under the rainbow umbrella. And it's a beautiful thing. We have all kinds of modern families going on and represented here today so I applaud that."

Coffey, a former TV host, proposed to Tim Smith between Christmas and New Year 2010, in Rotorua.

They became civil union partners in 2011, and have since opened bars together in Eat Streat, Rotorua.