Blenheim Drive was called after the winner of the 1930 Derby – Blenheim (1927–1958). The horse was also known as Blenheim II and was a British Thoroughbred race horse. "Blenheim Drive was named after H.H. Aga Khan's racehorse Blenheim, which won the Derby in 1930, with H. Wragg in the saddle". (Belfast Street Names. John J. Marshall)
"The Committee again considered application, dated 26th ult., from Messrs. Crawford & Lockhart, Solicitors for the Blakiston-Houston Estate Company, that new streets on the above-mentioned estate be named Grand Parade, Ardpatrick Gardens, Blenheim Drive, Trigo Parade, Cicero Gardens, Pommern Parade, Ladas Drive, Ormonde Gardens and Donovan Parade. Resolved – That with the exception of Blenheim Drive the foregoing names be approved, and in the case of Blenheim Drive Messrs. Crawford & Lockhart be requested to submit another name for the Committee’s consideration, in view of the fact that a street having the name Blenheim Street is situated in another area of the city. (22nd July 1930).
"Adverting to this Committee’s minute of 22nd ult. requesting Messrs. Crawford & Lockhart to submit another name in lieu of Blenheim Drive for a new street on the Blakiston-Houston Estate, it was reported that Blenheim Street, which was formerly in the Hemsworth Street area, had been abolished under an Improvement Order and there was not now any objection to the name Blenheim Drive for the street on the Blakiston-Houston Estate. The Committee accordingly approved of the name. (5th August 1930).