Fifty years ago when Marriott made the switch himself, it was a different world.
"When I was about 19 I suddenly had an epiphany and changed it, by deed poll, to my mother's new surname, Marriott. If I rightly remember, it cost about $90 to do so back then."
He considered having a "double-banger" surname but decided he wasn't "that sort of person". But if he had, he would have been "a sort of pioneer", given not many people had double-barrelled surnames at the time.
For kids under 18 going through a name change, one of the more common reasons was so they could share their parent's new surname after a marriage.
All the parents or legal guardians of a child must sign an official form before the child's name can be changed, or a court order can be made.
Last year 1964 children in New Zealand had one of their names changed, a slight drop from the previous two years, with 2036 registered in 2016 and 2037 the year before that.
Out of the 7000-odd people who registered a name change with the Department of Births, Deaths, and Marriages last year, three people switched to having only one name, instead of having both a first name and a surname.
The department would not reveal why each of those three people made the switch, but anyone wanting to have only one name must submit a letter explaining their religious, cultural, or philosophical reasons to do so.
It's a bit simpler for people registering a straightforward name change, as long as they don't pick a banned name.
There are plenty more reasons someone might choose to change their name - for Napier woman Margie Campbell, it was about connecting with her family history.
"I absolutely loathed my middle name that I was given," she said.
Campbell, whose middle name was Ann, applied to change it when she was 14.
"I have quite a strong Scottish heritage in my family, which I particularly connect with," said Campbell, now 52.
"It's on my father's side. For hundreds and hundreds of years every male in his family has been John Alexander or Alexander John . . . I got it into my head that I wanted to change my middle name to Alexandra.
"My mum and dad had to sign off. I was stoked and dad was stoked too . . . dad actually thought it was quite a nice thing to do.
"There's something about Scottish blood, I think. It runs very thick," said Campbell, who later in life got her family crest tattooed on her shoulder.
"I guess it's a side of my family that I really relate to."
By the numbers
Names changed in 2017: 7186
Change to having only one name in 2017: 3
People over 80 who changed their names in 2017: 23
Biggest age group to get names changed: 18-year-olds