Research
Here is a list of the old names in 1903. By 1909 they had been changed to the names as shown.
Albert---- Fulton
Cayuga--- Grosvenor
Concession-- Bronson
Dufferin--- Aylmer
Elm--- Riverdale
James--- Leonard
John--- Galt
King--- Rosedale
Mary--- Grosvenor, north block
Oak--- Cameron
Park---- Hopewell
Queen--- Carlyle
Shirley--- Seneca, Col By to Aylmer
Wellington--- Roslyn
William---- Barton
Some notes on street renaming, collected while trolling at the Land Registry Office in early 2008
Concession--- Bronson
Gloucester--- Riverdale
Lamothe--- Sunnyside
Parliament--- Bellwood
Park--- Hopewell
Rideau--- Echo Dr
Stanley--- Sunnyside
Torbay--- Riverdale
Woodridge--- Echo Dr
From my old book, "Ottawa Past And Present" published in 1927, I get the following info on origins of street names-
Aylmer--Baron Aylmer, Governor in Chief of Canada 1830-1835
Bank--formerly Esther, after Esther By, possibly due to Bank of Montreal
Barton-- after an early resident
Belmont-- after a character in Moores play, "The Foundlings"
Bronson-- Erskin Henry Bronson, lumber baron
Brighton-- a famous english watering place
Cameron-- after the builder of Stadacona Hall
Euclid-- after the famous geometer
Fairburn-- after a pioneer family in Ottawa south
Fentiman-- after the contractor who built the first house there
Galt--after John Galt, Ottawa Engineer
Glen-- after a Toronto realtor
Grosvenor-- after Grosvenor Square in London
Harvard-- Harvard University
Hopewell-- after Charles Hopewell mayor 1909-1912
Osborne-- Capt. Sherrard Osborne 1822-1875 British Naval officer and author
Ossington-- Lord Ossington 1800-1873 speaker British house of Commons
Riverdale-- along the river
Rosedale-- after street in Toronto
Roslyn-- after character in "As You Like It"
Seneca-- after the indian tribe
Sunnyside-- after the Toronto beach
Wendover-- after Viscount Wendover
Willard-- after Edward Willard English, actor at the time
Windsor-- after Windsor Castle
An example of a street renumbering:
Belmont Ave renumbered - Riverdale to Bank
1913 Ottawa City Directory lists 2 or 3 properties east / 1 west of Riverdale (north side) and 1 east / 1 west (south side) of Riverdale with "new" numbering, but all the rest with the original numbering. In 1914 directory new numbering is in place for entire street
1912 1914
& before & beyond
---------------------------
North side
21 159
Bellwood Ave intersects
25 163
27 167
31 171
35 175
39 183
41 185
45 187
49 193
53 197
69 203
South side
58 200
Bellwood Ave intersects [actually or later Willard Ave, by 1923 directory lists Bellwood as intersecting between nos 162 and 170]