I know there were about 53 Maria claimants.
But does anybody know, who they were? I mean, why did they claim to be Maria or what happened to them later?
I know about Alina and some Maria Martí.
Does anyone know some other names?
Royal impostors of the murdered Romanovs had to choose the younger ones for several reasons.
First of all, many people change in appearance from adolescence to adulthood - enough so that any dissimilarities between impostor and real (murdered) Romanov could be more easily explained.
Second, most of the older murder victims had family or friends (who survived the Bolsheviks) who would have known them well enough that it would have been pointless for an impostor to try to pass them off as a dead Romanov. Actually, this was also true of Anastasia, but for reasons unknown no one thought to ask her cousin Dmitri (to whom she was quite close) or her mother's friend Anna Virubova (ditto) if AA was ANR.
Third, I think the murder of Imperial children was particularly difficult for people to accept in the 1920's. So, even though more common might have otherwise prevailed, I think some people really wanted to believe that one of the Emperor's children survived.