Almina was the name of the Rothschild heiress who saved Highclere Castle (the palace from Downton) from ruiniation in (I think) around 1870. I believe the character of
Cora is loosely based on Almina Rothschild.
It reminds me of the names of one of my distant (eighteenth century) ancestors, who was named Almedia
Murray. Not Almeida, but Almedia.