Colonel Walter O'Hara was a prominent member of the British army in the 19th century, participating in battles fighting Napoleon, before immigrating to Toronto, Ontario, Canada, where he participated in the Rebellions of 1837 on the side of the government, defeating the rebels of William Lyon Mackenzie. In 1850, O'Hara was granted a 400 acre property on the western border of Toronto, forming the basis of the Brockton and Parkdale villages. Today, several streets in Toronto are named after his family, estate or prominence in his life:
- Roncesvalles Avenue, the site of the battle against Napoleon inSpain,
- Sorauren Avenue, another location in Spain
- Fermanagh Avenue, the county of his birth in Ireland
- Marion Street, the name of his wife
- Constance Street, the name of his daughter
- West Lodge Avenue, the name of his estate
- O'Hara Avenue
