These are pictures of Katherine as a young woman. She was a red head with blue eyes. Her great-grandmother was Catherine of Lancaster, and her great-great-grandmother was Philippa of Lancaster. Both daughters of John of Gaunt.

http://speedy.theanneboleynfil…..34×300.jpg
https://encrypted-tbn2.gstatic…..AFQ9-tqomA

http://upload.wikimedia.org/wi…..ow_002.jpg

This is a young Isabella, Katherine’s Mother.
https://encrypted-tbn3.gstatic…..S3zV7-GXHw