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
Anno Domini Anno Domini
In Coena Domini was created in 1363.
Vineam Domini was created in 1705.
meus scientia est vestri
Anellus domini - the master's little ring.
My Heart is forever your
Fides quod puto in vestri