mother of the Tudor dynasty

de bene esse: literally, of well-being, morally acceptable but subject to future validation or exception

Reading Philippa Gregory's "The White Princess". In the novel Elizabeth of York repeats that she is the 'mother of the Tudor dynasty' and it got me thinking. Which one of these women should be regarded as 'mother of the Tudor dynasty'? All of them, perhaps?

1. Elizabeth of York because she married Henry VII Tudor and together they've started a new dynasty.

2. Elizabeth Woodville because she gave birth to Elizabeth of York.

3. Margaret Beaufort because she gave birth to Henry VII.

4. Catherine de Valois, who married Owen Tudor and gave birth to Henry VII's father.