My mother is a green-card toting Canadian. She came to California when she was 25 with her first husband and my 2 or 3 oldest siblings (I'm not sure if Drew was born in the US or Canada, but since he died about 6 years before I was born it's neither here nor there). So two of my brothers are Canadians. The youngest (7 years my senior) is American born to Canadian parents. Then after the divorce she met my dad and had me (out of wedlock). So I'm born in the US to a Canadian and an American, but because my parents didn't marry till I was like 4, I have the right to claim my dual citizenship. Hmm... I never really thought of myself as 1st-gen, but on the maternal side I am
I don't know about her family's emigration to North America though because my mom was adopted. Her mom must have been English though, because her last name was Walters.
On my dad's side... the old story about someone coming over on the Mayflower. I know he had one French grandmother, but the rest is (to the best of our knowledge) pretty solidly English stock (puh-leeze... can I get any more WASPy?)