Like many Basque surnames, Garibai is descriptive of the original family house.
The coat of arms of the town of Oñati reflects the families that have had historical relevance.
In the upper two are represented, on the left an eagle as a symbol of the Gamboine family of the Garibai, the Eagles; In the right a deer is represented in the attitude of running, as a symbol of the Oroñina family of the Murguía, the Deer.
The lower quarter is occupied by a wounded deer on a wheat field and on it an eagle with its claws and beak eating at the heart.
This shield was of the family of Garibay and was adopted by the town in 1775 to replace another one that had Saint Michael striking down the devil.