I don't think they have officially introduced anyone by that name. I did notice one character who may fit the bill though. They never mentioned her name but she looks about the same but it is hard to say for sure since the clothes are different and the lighting is different.
now the following reasons are why i think she could be the same person
They both have roughly a pyramid shaped hairdo
She was on Wulfenbach Castle
She has roughly the same size and shape
Now I know that those reasons could be used fit several people or Ludmilla may have not been shown yet but based on what we know so far this is my best guess.