We live in Melbourne Australia. The name of our road is yar Orrong.
Can anyone tell me what that means, either as 2 separate words, or a
combined meaning. I assume it's Aboriginal.

Niiiice address!  First hit on the name was a real estate agent ...

The local Aborigines of the Yarra Yarra tribe in the Melbourne area
seem to have spoken Boon (or Bun) Wurrung  or  Woi Wurrung.  (Could
"Orrong" be a corruption of Wurrung?).
One site said that at the Galeena Beek Cultural Centre there has been
some work at collecting words from Woi Wurrung.
You might try calling there.

GALEENA BEEK LIVING CULTURAL CENTRE
	
WEBSITE 	-
EMAIL 	-
PHONE 	03 5962 1119
FAX 	03 5962 1124
ADDRESS 	22-24 Glen Eadie Avenue, Healesville VIC 3777

G'luck!

The closest I could find was orronggorr which means drunk and
oranarr/orangarr which means husband!
http://www.geocities.com/Athens/Delphi/2970/olkola.htm

Sounds good, k1s-ga, but the York Peninsula is a continent away from Melbourne.
With an estimated once 200 Aboriginal languages in Australia, I doubt
that there is a connect.  But it is kind of nice to think that one of
the best addresses in Melbourne might refer to drunken husbands.  ;-) 
On Melbourne Cup Day, they probably are.

It would be interesting to hear if ghadirr-ga learned anythin from
Galeena Beek or elsewhere.

G'day,
Myoarin

I suspect the term relates to the Yarra River.

"Yarra" (which could be represented as "yar") is of indeterminate
meaning - the best evidence says "Yarra Yarra" was a term used from at
least Richmond to Werribee meaning "waterfall". It's meaning as the
name of a river, or as "water" (used in a number of placenames) is
mainly due to European misunderstanding.

"Orrong" could well be a version of
"Barrern/Berrern/Bararing/Birrarrung/Bayrayrung/Burerring", a name
used for the Yarra.

See www.stonnington.vic.gov.au/library/online/coopers_history_of_prahran_chap1.htm
and www.vaclang.ozhosting.com for more on local Aboriginal names.

For a definative answer, I suggest visiting the Stonnington Local
History Collection in Prahran or Malvern
(http://amol.org.au/guide/instn.asp?ID=V151). The Prahran and Malvern
Historical Societies should also be able to help.