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): Emil Theodor Kocher • Frederick Forsyth • H. Trendley Dean • Ian Falconer • Isobel Hogg Kerr Beattie • Jim Smith (cricketer, born 1906) • Karl Friedrich Bahrdt • Max Muncy • Petria Thomas • Shock G • Taslima Nasrin • Walt Kelly • Álvaro Mutis

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