Catherine Trastamara is a character in the Lilydale series.
She was the daughter of Isabella and Ferdinand Trastamara, wife to Henry VIII Tudor and mother to Henry and Mary Tudor.
- Ferdinand Trastamara (father) †
- Isabella Trastamara (mother) †
- John Trastamara (brother) †
- Joanna I Trastamara (sister) †
- Maria Trastamara (sister) †
- Henry Tudor (son) †
- Mary I Tudor (daughter) †