Lady Katie Percy
noblewoman; English gunsmith and mechanic
Lady Catherine Sarah Percy (formerly Valentine; born 23 June 1982) is an English gunsmith and mechanic. She served as the chief mechanic for Marquass Motorcycles before starting her own firearm manufacturing business.
Early life
Lady Katie Percy was born on 23 June 1982. She is the daughter of Ralph Percy, 12th Duke of Northumberland and Jane Percy, Duchess of Northumberland and grew up at Alnwick Castle. She is the older sister of George Percy, Earl Percy, Lady Melissa Percy, and Lord Max Percy.
Career
Percy started working as a mechanic on vintage cars and bikes in the early 2000s, enrolling in a three-year mechanic course for certification. She was chief mechanic for Marquass Motorcycles, appointed by company founder Ben Whately. After working as a mechanic she trained with James Purdey & Sons, the royal gunmakers, and set up her own business making stocks for sporting guns.
Personal life
On 26 February 2011 Percy married Patrick Valentine at St Michael's Church, Alnwick. A man named Michael McNamara sent letters to Percy prior to her wedding, allegedly threatening to crash the ceremony.
The public source identifies “Lady Katie Percy” as noblewoman; English gunsmith and mechanic. This brief keeps that definition visible, then builds a research path around Lady, Katie and Percy.
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Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Aug 25, 2026. The linked authority identifier is Q59304517. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1982 and 2011.
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This entry incorporates text from “Lady Katie Percy” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.