Can you help me think of boys names that fit this criteria?

[pollylongstockings]

Cannot be shortened to form a nickname
Not too modern
Not too old fashioned
Not common (chavy or overused)
Not posh
Has to be longer than 3 letters as surname is very short

George?

I think you will find most names which don't even have the remotest chances of being shortened do.

My ds is Adam but gets Ads, Ad or Adsy.

My cousin is Laura and gets Loz.

As examples.

George, I agree
Jonah
Rufus
Stuart
Owen
Oscar
Liam
Lucas
Callum
Harry
Fionn
Frank
Keir

Luke
Jude

Stuart because Stewie of course

Mark
Marcus
John
Rhys

But short names get lengthened!

Miles
John
Luke

Mark
Noah
Kerr
Blair
Bruce
Dale
Dean
Clyde
Kyle
Drew
Eliot
Glen
Gene
Hugh
Gary
Kevin
Leon
Kieran
Lloyd
Forbes
Morgan
Murray
Neil
Paul
Sean
Toby

Philip

Niall

I need to add another point:

Needs to be more than one syallable because of short one syallabled surname.

Quentin
Rory

Joshua
Marcus
Lucas
Sebastian
Tobias

Why don't you want the name to be shortened? Just realised that was one of your criteria and that all of the names I suggested can indeed be shortened. Quite hard to find one where a nick name is not an option I should think.

Aidan? Although is my younger brother's name and we call him Aidy

Adrian
Damien
Fabian
Oisin
Ronan
Jonas
Casper
Jasper
Darius
Hamish
Jeremiah
Gareth

Bea r in mind that where there's a will there's a way when it comes to giving nicknames or shortening names.

Graham
Liam
Logan
Nathan
Mason
Hayden
Evan
Reuban
Caleb
Felix
Justin
Curtis
Eric
Kelvin
Bruno
Arran
Otis
Colin
Percy
Boris
Orson

Why don't you want it to be shortened to form a nickname? Just curious.
My parents went out of their way to select a name that can't be shortened and doesn't have an obvious or attractive nickname.
And I have always been very slightly sad fact that no one in my life has a special name for me.

Aidan
Milo
Noah

My ds's name Ellis.Beautiful.

Or Elliott.

My ds is rory. We picked it for many of the same reasons you have set out. One point to note however my brother calls him Rorers - so whatever you pick people will find a way to create a nickname if they want to. Still wouldn't have picked anything else.

my rory is royster doyster

I knew a family once who went for "Iain" and "Mark" as undiminutive-able names.

Personally I don't think short names in total are a problem (as someone who grew up struggling with six syllables!). e.g. Mark Ford, Ian Day. Sounds fine. Cut out for success I'd say.

Can't think of an unshortenable name with two syllables. Derek?

Any name can be shortened if you try hard enough.

My son is George, known as Goo.

Jasper
Percy
Rufus
Simeon