Coming up in my garden right next to some forest (primarily oak mixed with beech, birch, maple) in southwest Sweden. Last year i dug the area out and removed (most) roots. Not much came up but this little sprout. I suppose it could be roots reaching in from the adjacent forest.
Could it be a Yukka plant?
Very much doubt it, its not really something that grows around here. Good guess tho the sprouts look quite similar!