Lady Katherine Grey

Katherine Seymour, Countess of Hertford was a younger sister of Lady Jane Grey.

25 August 1540

Born on the same birth day (25 August): Adam Warren (baseball) • Alexander Mair • Allan Pinkerton • Ally Walker • Arpad Elo • Camille Pin • Catriona Matthew • Darrell Johnson • Deanna Nolan • Duleep Mendis • Florian Mohr • Geoff Downes • Jacques Demers • James W. Gerard • John Savage (actor) • Jung Jung-suk • Justin Upton • Kurban Berdyev • Miro Cerar • Philipp Mißfelder • Rachel Bilson • Spider One

Born in the same month (August 1540): Joseph Justus Scaliger