It can be either genitive singular (of your master / lord) or nominative plural (your masters / lords). (Technically, it can also be the vocative plural, but I'm not sure that would make any sense!)
René Vestri was born on 1938-10-25.
Mauro Vestri was born on February 25, 1938, in Genoa, Liguria, Italy.
I care for you.
All your base
vestri matris
In Coena Domini was created in 1363.
Vineam Domini was created in 1705.
Anno Domini Anno Domini
meus scientia est vestri
Anellus domini - the master's little ring.
vestri,vestrum,tui,vester,vestra
Fides quod puto in vestri