Ur
as far as im concerned
ur is a short for
you are or
your in English. the only Polish thing i can think of is "urodzony" which means
born, but it doesnt make any sense if you put it in front of a name... born Justysia?? lol.
ur. would be suitable in front of a date of someones birth, like
ur. 26.12.1982. you can often find it on tomb stones actually!