Her mother, Lady Augusta FitzClarence, was an illegitimate daughter of William IV of the United Kingdom; Wilhelmina, also known as Mina, was born the day after William's succession as monarch.
She travelled as a young girl throughout Europe, visiting the courts of France and Hanover.
In 1855, Mina married her first cousin William FitzClarence, 2nd Earl of Munster; they would have nine children, including the 3rd and 4th Earls of Munster.
The Earl and Countess of Munster lived at Palmeira Square in Brighton.
Later in life, Lady Munster became a novelist and short story writer.
In 1889, she released her first novel, Dorinda; a second, A Scotch Earl, followed two years later.
The year 1896 saw the publication of Ghostly Tales, a collection of tales on the supernatural which have largely been forgotten today.
Lady Munster also produced an autobiography entitled My Memories and Miscellanies, which was released in 1904.