Any suggestions? I would like classic, not weird, prefer not super popular, but [name]Matthew[/name] was really popular so it wouldn’t be a deal breaker.
[name]Just[/name] stuff that randomly pops in my head:
[name]James[/name]
[name]Oliver[/name]
[name]Philip[/name]
[name]Gavin[/name]
[name]William[/name]
[name]Andrew[/name]
[name]Patrick[/name]
[name]Hope[/name] that helped!
I love the pp’s suggestions of [name]James[/name], [name]Gavin[/name], and [name]Patrick[/name]!
What about:
[name]August[/name]
[name]Jack[/name]
[name]Luke[/name]
[name]Isaac[/name]
[name]Charles[/name] (nn [name]Charlie[/name]?)
[name]Henry[/name]
[name]Holden[/name]
[name]Ian[/name]
[name]Benjamin[/name]
[name]Zachary[/name]
[name]Caleb[/name]
[name]Vincent[/name]
[name]Josiah[/name]
[name]Joseph[/name]
[name]Jonah[/name]/[name]Jonas[/name]
[name]Gabriel[/name]
[name]Noah[/name]
Good luck!
[name]Benjamin[/name]
[name]Christopher[/name]
[name]Nathaniel[/name]
[name]Alexander[/name]
[name]William[/name]
[name]Elijah[/name]
[name]Jonathan[/name]
[name]Samuel[/name]
[name]Caleb[/name]
[name]Joseph[/name]
[name]Anthony[/name]
[name]Lucas[/name]
[name]Gavin[/name]
[name]Owen[/name]
[name]Blake[/name]
[name]Liam[/name]
[name]Brendan[/name]
[name]Tristan[/name]
[name]Oliver[/name]
[name]Benjamin[/name]
[name]Christopher[/name]
[name]Nathaniel[/name]
[name]Alexander[/name]
[name]William[/name]
[name]Elijah[/name]
[name]Jonathan[/name]
[name]Samuel[/name]
[name]Caleb[/name]
[name]Joseph[/name]
[name]Anthony[/name]
[name]Lucas[/name]
[name]Gavin[/name]
[name]Owen[/name]
[name]Blake[/name]
[name]Liam[/name]
[name]Brendan[/name]
[name]Tristan[/name]
[name]Oliver[/name]
[name]Benjamin[/name] was my first thought as a brother’s name for [name]Matthew[/name]. Some other possibilities not already mentioned above:
[name]David[/name]
[name]Peter[/name]
[name]Edward[/name]
[name]Edmund[/name]
[name]Robert[/name]
[name]Philip[/name]
[name]Malcolm[/name]
[name]Warren[/name]
[name]Julian[/name]
My brother’s name is [name]Matthew[/name], and if I was going to be a boy, my mom wanted to name me [name]Ian[/name]. [name]Andrew[/name] was also a possibility.
Like the pp’s, I also really like the suggestion of [name]Benjamin[/name] with [name]Matthew[/name].
Another [name]Matthew[/name] I know has two younger brothers, [name]Daniel[/name] and [name]Peter[/name], and they all go very well together!!
[name]Matthew[/name] and [name]Thomas[/name]*
[name]Matthew[/name] and [name]Joshua[/name]*
[name]Matthew[/name] and [name]Jonathan[/name]
[name]Matthew[/name] and [name]Lachlan[/name]
[name]Matthew[/name] and [name]Samuel[/name]
[name]Matthew[/name] and [name]Bradley[/name]
*my favourites
emiliaj
A childhood friend of mine had brothers called [name]Douglas[/name] and [name]Matthew[/name]. Though [name]Douglas[/name] was older. 
A friend has [name]Matthew[/name], [name]Jacob[/name] & [name]Simon[/name], I think they work well.