Today they issued a statement, thanking police and all those involved in the search and rescue operation "for their huge commitment and compassion, as we come to terms with what has happened"
They also thanked friends, family and wider whanau for their support and love.
"Thanks also to Cameron's friends for their expressions of love and compassion. It means so much to us to know how much Cameron was loved.
"Cameron loved being in Wellington, after arriving at the beginning of this year" the Millars said.
"Cameron is a treasured son and brother. He is creative, quirky and a real individual. You couldn't find a kinder person than Cameron. He's always made us laugh with his unique sense of humour."
Mr Millar, who grew up in Hamilton, was one of four children - he has one older brother and two younger sisters.
He graduated from Whitireia Polytechnic in June this year with a diploma in radio broadcasting.
The family asked for privacy as they came to terms with Mr Millar's disappearance.
- NZPA