Which sounds better?

asbo

Double barrel name possibility of: 

Dean-Graham

Or

Graham-Dean  

asbo

These are our surnames. 

StefMurph

Typically when using the surnames of both parents, assuming a male/female couple, the female's name is first.
ETA: My stepson's name is hyphenated, although his bio mom and dad were never married. It has been a complete PITA when it comes to filing taxes and any type of school registration. We've had taxes rejected if the names are entered incorrectly.

plunderb

I like the sound of Graham-Dean better, but that's pretty arbitrary ? both sound fine.

If you decide not to do a hyphenated surname, I think both names make great first names.

aessary03

I don't like the hyphenated name .... but would go for fn/mn combo.  And I prefer Dean as the fn.

magsugar13

Neither

WashingtonQueen

I'd say Graham-Dean.

amberrrjade

Nevermind

 

ETA: My first response was I thought these were first names. Dean-Graham sounds better because to me Graham-Dean runs together like gramdeen. 

queenbone

I think the woman's surname is always used first.

asbo

In which case Graham-Dean it is if we go for the double barrel surname.