In 1916, he was killed in action at Somme.
Architect Gordon Bogle joined the Australian Imperial Force.
He was killed in action at the age of 29 when a shell exploded beside him during the Battle of Menin Road in 1917.
He had a hand in the design of the Waipukurau Railway Station.
The only son to survive was Archie Bogle, the eldest son, who left his wife and child to enlist with the New Zealand Expeditionary Force and fight in France.
The successful engineer died in 1972 aged 89.
About 40 people including nine family members attended the ceremony.
A poem written by one of the brothers was read, followed by the last post and ode of remembrance.
Central Hawke's Bay mayor Peter Butler and Max Bogle, the youngest living great grandson of Archie Bogle unveiled the new signage.
Family then laid flowers at the feet of the new memorial.