I have only ever met one
Larisa and she spelled it
Larissa. I believe her name was
Larissa Marie but that was a common MN in the US in the 1980's. I think that with
Larisa you need either a one sylable MN or some very distinctive as a middle name.
Larisa ClaireLarisa AnneLarisa MaeveLarisa AntoinetteLarisa GuinevereLarisa Catriona