The magistrate also banned Amy Woolford for driving for six months - the mandatory minimum.
A Ministry of Justice spokeswoman refused to pass on the Herald's questions to the judge and warned that it would be "highly inappropriate" to seek comment at the family's Epsom home.
Amy Woolford did not respond to online messages.
Her father was previously appointed Second Secretary to the New Zealand High Commission in Singapore and in 1985 he was the New Zealand Representative to the Legal Committee of the United Nations General Assembly in New York.
More recently Justice Woolford was a Crown prosecutor and partner at Meredith Connell before being appointed to the bench.
He has adjudicated several high-profile cases and was the judge who overturned the Maori King's son's discharge without conviction on a drink-driving charge.
"I am not satisfied that a conviction for drink driving would meaningfully decrease his chances of becoming the next Maori King, or have any other consequence out of all proportion to the gravity of the offence. A drink driving conviction is a black mark, but not an irredeemable one," he said.