[Jo of Palatine]

Just wanted to add this to the discussion about Diana's parentage:

From Wikipedia:

"Elizabeth Bowes-Lyon was the fourth daughter and the ninth of ten children of Claude George Bowes-Lyon, Lord Glamis, (later 14th Earl of Strathmore and Kinghorne), and his wife, Nina Cecilia Cavendish-Bentinck. She reportedly was born in her parents' London home, though the location of her birth remains uncertain. Her birth was registered at Hitchin, Hertfordshire, near the Strathmores' country house St Paul's Walden Bury. This unconventional registration has led to numerous rumours over the years regarding Elizabeth's actual parentage, with some critics surmising that she actually was the daughter of Lord Strathmore by a Welsh maid, hence the unusual six-week delay in the registration of her birth. Others have pointed out that Elizabeth, born seven years after the next-youngest Bowes-Lyon child, resembled neither her parents nor her siblings in any discernible fashion. An urban myth in the 1960s even claimed that she had been adopted by the Earl and Countess and was in fact one of twins born to a working class woman in Waterford in Ireland. The rumour even claimed that she was in fact a couple of years older than had been announced. The rumour was universally dismissed. A distant family link between the Bowes-Lyon family and the Waterford area is believed to be the cause of the rumours.