I know about A3, Q3, and TT, as well as Q4 e-Tron. But A4, A5, A6, A7, A8, Q5, Q7, Q8, and R8 are not related to any VW models. Four out of thirteen models that share platforms does not a rebrand make.
For the record, I'm completely in agreement that Lincoln is not simply a rebranded Ford and should not be considered such. Someone somewhere said that only the Zephyr deserved that criticism in recent years - and rightly so, IMO.