More than 140 family members have registered their interest on Facebook to attend what will be a "humongous family reunion" in Wairarapa and more are expected.
The Wyeths, one of Masterton's oldest families, will be celebrating a 175-year reunion since their ancestors arrived in New Zealand in 1840.
Lyn Tankersley, a member of the Wyeth family, is excited for what will be the second Wyeth family reunion she has attended.
"There are around 140 people on the Facebook page wanting to attend but I expect there will be more who say they will come closer to the event," she said.
"I would say probably 200 to 300 people will attend which really is a humongous reunion."