Kate Middleton reveals her grandma's job was a WWII Codebreaker

How inspiring is this?

It’s always fascinating learning about your family history whoever you are, but if you’re the Duchess of Cambridge, we can imagine marrying into a Royal family comes with a pretty extensive family tree to get through.

Royal family aside, it turns out that Kate Middleton has quite the inspiring and interesting family herself (not that it’s a family-accomplishments competition or anything), revealing that her grandmother was as a WWII codebreaker.

Kate Middleton’s grandma worked in Bletchley Park, Britain's top-secret Government Code and Cipher School headquarters, where mathematician Alan Turing developed the Enigma machine, along with her twin sister in the ultimate code-cracking double act.

This information comes from Duchess Kate’s foreward in the debut puzzle book from the U.K.'s Signals Intelligence and Cyber Security agency, GCHQ, Time reports.

‘I have always been immensely proud of my grandmother, Valerie Glassborow, who worked at Bletchley Park during the Second World War,’ Duchess Kate wrote.

‘She and her twin sister, Mary, served with thousands of other young women as part of the great Allied effort to break enemy codes,’ Middleton wrote. ‘They hardly ever talked about their wartime service, but we now know just how important the men and women of Bletchley Park were, as they tackled some of the hardest problems facing the country.’

The new puzzle book is a part of Heads Together, Duchess Kate and Prince William's campaign for mental health.

‘William, Harry, and I are very grateful that this book is supporting our Heads Together Campaign,’ Kate continued in the foreword.

‘I hope it will not only amuse and challenge readers, but help to promote an open discussion of mental health problems, which can affect anyone, regardless of age or background. Together, we are aiming to change the national conversation around mental health from stigma and fear to openness and understanding.’