While I didn't find anything about Alguebeth, I did find the name 'Agabeta' in red pen. Something I noticed was there was a date next to it - 1400. Well naturally this isn't Malik's, as if he was born 300 years ago, that would have made it somewhere in the early 1700s. And it wasn't Elizabeta, as her date of birth is 1300. 2000 - 1400 = 600, which is how old the Count is... perhaps that's the Count's real name? Ivan, Agabeta and Arta.