
According to Reuters, the coat of arms contains three acorns, which represent the Middleton children Catherine, Philippa and James. Acorns were chosen because the oak tree symbolizes England and strength. The gold chevron represents Kate's mother Carole, whose maiden name is Goldsmith. The red and blue colors are used because they are the dominant colors in the British flag and the shape of a lozenge suspended from a ribbon signifies Kate is an unwed daughter.
"Mr. and Mrs. Middleton and their children took enormous interest in this design and, while its purpose is to provide a traditional heraldic identity for Catherine, as she marries into the Royal Family, the intent was to represent the whole Middleton family together. Every Coat of Arms has been designed to identify a person, school or organization, and to last forever: heraldry is Europe's oldest, most visual and strictly regulated form of identity," says Woodcock.
The coat of arms' purposes nowadays is to symbolize a family's identity. All three Middleton children will be able to use the family's coat of arms and James Middleton will pass it down to his descendants.