The largest category is German at a whopping 15%. English only comes in at 8%. Irish is a huge category as well.
The data in the Canadian census in 2001 gives an incomplete picture as many people refused to answer ancestry information. A cursory search on the net shows "4 out of 9 Canadians have majority British descent" while 12.9% reports majority Irish descents.
This gives about 57% of all Canadians as British/Irish descent. Minus French (30%) this means 81% of all "English Canadians" are British/Irish in descent. The figures do look interesting.
If you create a "metaethnicity" of all Germanic language speakers in continental Europe (German s, Dutch, Swiss, Austrians, Flemish, Alsatians, German-Russians), there are about 50 million Americans of a Germanic metaethnicity in the U.S., about 21% of the population.