Sarah's brother could be called..

[IgglePiggle4Tea]

Sorry, we're really struggling! Two syllable surname beginning with a hard D.

Duck

Sarah and:

Jeremy
Reuben
Luke
Cameron
Nicholas
Adam

Sarah is such a neutral name, it would go with most things as long as they're not too unusual.

Robbie

Antony or Christopher or James

Laurence
Ellis
Eli
Daniel
Joseph

Luke

James
Matthew
Thomas
Jack

I'm a Sarah with a brother called Charlie

James

Connor

David is the first one that sprang to mind but I can see that might not work with your surname! How about:

Thomas
Joseph
James
Luke
Matthew

…My name is Sarah & my brother is Toby 😬

My brother is called Andrew. Our surname begins with a hard 'D' and is 2 syllables.

And I'm a Sarah, I forgot to add.

3 Sarahs I know have a brother called David but that does that work with your surname?
I suppose it didnt do David Dimbleby any harm!

Matthew was my first thought

@sjxoxo

…My name is Sarah & my brother is Toby 😬

@sjxoxo Did you ever have to save him from the Goblin King?

Troy
Toby
David
Michael
Paul
Peter
Xander
Alex

Adam

These have been great, thank you!

Thomas.

John
Edward
Flynn

Duck

James