The touching tribute to Princess Mary's dad in her royal coat of arms

When Princess Mary married Prince Frederik in 2004, she officially became a member of the Danish royal family and was honoured with a coat of arms to go with her new title.

But the newly-crowned royal made sure to honour her humble roots with a touching tribute to her dad in her coat of arms.

Mary, who was born to Scottish parents and grew up in Tasmania, wanted to include nods to her Scottish heritage and Australian upbringing.

She chose a MacDonald eagle and black boat to symbolise her Scottish ancestry on her coat of arms, then included a blue section with two Commonwealth stars to represent her Australian roots.

As for her personal symbol, Mary chose a gold rose, the coat of arms topped off with a heraldic crown of a Crown Prince of Denmark.

It's an intricate design, as most coats of arms tend to be, but in a sweet twist it's also almost identical to her dad's coat of arms.

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Mary's father, John Dalgleish Donaldson, was also granted a coat of arms when his daughter married into the Danish monarchy.

His is a near perfect match to his daughter's, symbolising their close bond, with just a few small tweaks.

Instead of a gold rose, the mathematician used a gold infinity symbol as his personal symbol, and his is topped with a helmet rather than a crown.

Both coats of arms now sit in the Danish Chapel of the Royal Orders, where the father and daughter coats are clearly recognisable for their striking similarities.

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Mary and her father share a close bond, John walking her down the aisle on her wedding day in 2004.

He arrived with her at Copenhagen Cathedral on May 14 that year, dressed in a kilt and full Scottish formal wear as he escorted the glowing bride into the venue and down the aisle to her prince.