From the experts:
Maud, lacy and mauve-tinted, was wildly popular a hundred years ago, but has been rarely heard in the past fifty. Some stylish parents are starting to choose Maud again, especially as a middle. Maude is another spelling.
As a British royal name, Maud was the daughter of the youngest daughter of King Edward VII and granddaughter of Queen Victoria, who went on to become Queen of Norway. As a lively young girl, she was given the boyish nickname of Harry.