Named in honour of Revd. Isaac Nelson (1809-88), Presbyterian minister, abolitionist and Irish nationalist politician. Nelson Memorial Church (now deconsecrated) adjoins Nelson Square.
"That Mr S. J. Livingstone be informed in reply to his application of 29ᵗʰ ult. to name the street between Bellevue Street and Sugarfield Street Nelson Square that the street in question was named Annesborough Street, on the application of the owners some time ago, and any application to change that name must be signed by all the owners of property interested". (8th December 1897).
Nelson Square Owner: Mr John Nelson of 105 Royal Avenue - property situate off Belevue Street and Sugarfield Street - Nelson Square - 16th February 1898. It had previously been called Annsborough Street.