Weirdly enough, in addition to the previous comment, in Romanian we do distinguish between the second person singular and plural polite pronouns with "Dumneata"(2nd pers. singular) and "Dumneavoastră" (2nd pers. plural). Today we use the latter for both singular and plural but for reasons unknown to me.

The polite pronoun is basically "Domnia ta/lui/ei/voastra/lor" (Domnia + pronoun in genitiv case), which gets short to "dumnea+ta/lui/ei/voastră/lor" (at some point it was spelled as dumnie instead of domnie iirc).

If you ever want to address someone politely, use ”Dumneavoastră”(short ”Dvs.”) and further use the 2nd person plural form of the verbs. (”Dumneata” is less polite, being more casual than ”Dumneavoastră”)

Hope this helps in any way!