Louis Mountbatten stood to unherit a share through his mother Victoria(not Queen Vic) who was sister to the Tsarina Alix ( Alexandra) as a collateral descendant. But not of course if Anna Anderson was Anastasia.
The Mountbattens were descended from Princess Alice, Queen Victoria`s daughter who married Ludwig IV of Hesse am Rhine. Somewhere along his line there is a scandal, a liason with a groom - can`t remember exact details but the children of this affair were accepted into the family alongside the legitimate children and Louis Mountbatten was descended from one of the illegitimate ones and it really bugged him.
Louis of Battenburg (father to Louis Mountbatten) was the son of a Morganatic marriage.
His father Alexander of Hesse married Julie Therese Hauke ( A Polish Countess) who was a lady in waiting to the Tsarina Maria. She and her siblings were also ward's of the Tsar, after they were orphaned.
Julie was six months pregnant when the couple married. Their children were not allowed to be in the succession because their mother was not of high enough rank. They were titled Serene Highness rather than Grand Ducal Highness.And used the Battenberg surname rather than Hesse.
Lord Mountbatten, it seems had romantic feelings for the Tsarina Marie, and kept a photograph of her by his bedside. Maybe the reason he was so involved rather than money?
The present Queens children use the surname Mountbatten- Windsor. So that Prince Philip could pass on his family name to his children. Which, I think, is only right and proper.The Royal family took up the name Windsor in 1917, getting rid of Queen Victoria's Germanic surname.Which was not, unsurprisingly, popular.