No. This is really the sole survivor. There were many elms on the Hill. I'm old enough to remember that there were elms all along the front right by the walls on the Wellington Street end. At every 50 feet maybe there was a large elm shading the front of the Parliament Buildings, shading Wellington Street.
There's a CBC archive video from 1979 showing the workers cutting down all those elms in the fight against Dutch elm disease. It's a pretty hard video to watch actually. Yes, it's not that long ago there were many significant large elms on the Hill, but this is the only survivor now.