I have to admit that your example No_Last_Name-1234567 sounds really funny and made me laugh.
The WikiTree IDs are not relevant with respect to the profile's content: Relationships, dates, biography, etc.
María was a very usual indigenous female name in Hispanic America. At this time those profiles are Unknown-nnnnnn: María Unknown. A much better aproach is María No Last Name.
There wouldn't be any special relevance in having ID = María-1 born in Lima, Viceroyalty of Peru on 1560 and María-2 born in Mexico City, Viceroyalty of New Spain on 1675.
Emperor Hirohito's profile is the same if the profile representing him is Michi-No-Miya-1, Hirohito-1 or No_Last_Name-1234567.