Family reunion organiser Evan Lewis, of Dunedin, said 67 people from around New Zealand and Australia attended the event.
One of the family's better-known members, former National Party leader Don Brash, was overseas and unable to attend.
The family's founders, William Brash, a bootmaker from Scotland, and his wife Catherine, arrived in Dunedin on July 13, 1858 and settled in Mosgiel before buying a farm on Saddle Hill.
Those attending the reunion visited the farm, which is no longer in family ownership, on Saturday, before a dinner and an opportunity to share their stories.
Three of the Brashes' children were married at the East Taieri Presbyterian Church and family members attended a service there on Sunday.
