sorry for my repet question is really that a big part of white americans have german heritage?

I know americans are americans (citzenz of Usa :) I am talking about ancestry and heritage, I know that there are irish, italians, polish, english (wasps colonists), spaniard (and white hispanic or mestizos) but now the largest group is german, some americans do not know it, but I discovered that, sorry for my english, I was doing well in english but now I forget it and english americans is more different