There's a list on the govenrment's web site of every judge in the system and, particularly if you narrow down to Toronto, there aren't THAT many possibilities. If it's true, I suspect people in the know (e.g. lawyers, court reporters) would be aware of rumours...
http://www.ontariocourts.ca/scj/judges/current/judges/#Judges_of_the_Toronto_Region
Female Judges of the Toronto Region
The Honourable Alison Harvison Young
The Honourable Andra Pollak
The Honourable Anne M. Molloy
The Honourable Barbara A. Conway
The Honourable Beth A. Allen
The Honourable Bonnie L. Croll
The Honourable Carole J. Brown
The Honourable Carolyn J. Horkins
The Honourable Darla A. Wilson
The Honourable E. Eva Frank
The Honourable Elizabeth M. Stewart
The Honourable Faye E. McWatt
The Honourable Frances P. Kiteley
The Honourable Gertrude F. Speigel
The Honourable Harriet E. Sachs
The Honourable Jane E. Kelly
The Honourable Janet Wilson
The Honourable Julie A. Thorburn
The Honourable Katherine B. Corrick
The Honourable Katherine E. Swinton
The Honourable Lois B. Roberts
The Honourable Mary A. Sanderson
The Honourable Maureen D. Forestell
The Honourable Nancy J. Spies
The Honourable Nancy L. Backhouse
The Honourable Nola E. Garton
The Honourable Ruth E. Mesbur
The Honourable Sandra Chapnik
The Honourable Susan G. Himel
The Honourable Susanne R. Goodman
The Honourable Suzanne M. Stevenson
The Honourable Tamarin M. Dunnet
The Honourable Victoria R. Chiappetta
The Honourable Wailan Low
The Honourable Wendy M. Matheson