The White Thing: Exploring the Evidence
The White Thing: Discussion and Evidence
As further evidence we have the sketch done by Holbein of the Thomas More family, and the copy of the painting done in the late 1500s.
From Wikipedia. Note the change in personnel between the sketch and the painting.
Sketches and Portraits
If you click on them, you'll be taken to a much larger version, in most cases.
Images from Wikimedia Commons.
Image from the British Museum Collection