These are all great possibilities. Her last name is incredibly rare so I'm not going to share it but I think the Scandinavian connection is a possibility, as is this one, and the possibility it's an alternative spelling of
Larisa. Hmmm
My PNL = http://www.behindthename.com/pnl/37275
Top: William and Cordelia (main) / Sirius & Eydis (GP) / James & Charlotte (top25)
Bottom: Delsin and Ebba (main) / Dinadan & Neon (GP) / Corvo & Deva (top25)