Melgund Street correction
Your article on Glebe Street names was very interesting, The question of Melgund St had me Googling the net, and I think it may be named after a future GG - Earl Minto the former Lord Melgund, the dates are about right.
Thanks for the great detective work! I think you have the answer.
In 1883, Gilbert John Elliot, Viscount Melgund, came to Canada as military secretary to Governor General Lansdowne. Melgund was very active in raising a Canadian volunteer force to serve with the British Army in the Sudan Campaign of 1884. He served as an aide-de-camp to General Middleton during the North West Rebellion of 1885, and was offered command of the North West Mounted Police, but declined the post and returned to England. Viscount Melgund succeeded to the Ealdom of Minto on his father's death in 1891. As Earl of Minto, he was Governor General of Canada from 1898 to 1904. He became the Viceroy of India in 1905, where he instituted many reforms and carried on the traditions he had established in Canada. He retired to England in 1910 and, for his lifetime of service, was made a Knight of the Garter.
Likely the street was named 'Melgund' to honour the service that the Viscount had already provided to Canada before his elevation to the Earldom in 1891.