The English language comes from what is now Denmark, Germany, and the Netherlands. A lot of influence from Old Norse, which is also what Swedish originates from.
Maybe Æ will be a part of English again in 700 years :)
And the English speaking world still calls it a double U. Maybe the Swedish should have settled for double V: vv ;-)
In French they do call it "double V". I wonder why in English it's U though.
Because originally in English it actually was "uu", not "vv".