I have 2 boys [name]Devin[/name] and [name]Dylan[/name] and pregnant with 3rd boy…We are thinking on [name]Tyler[/name] or [name]Brandon[/name]…Please tell us which you like best to fit in…
My initial thought was [name]Darien[/name], because I saw [name]Devin[/name] and [name]Dylan[/name] and thought “[name]Darien[/name] would go great with those two!”
Out of your two choices though, I would go with [name]Tyler[/name] 
I really dislike the name [name]Brandon[/name] … too many unpleasant Brandons in my life.
[name]Devin[/name], [name]Dylan[/name] & [name]Tyler[/name] <3
TMy votes is for [name]Tyler[/name]!
[name]Tyler[/name]! It fits well imo.
I’m going to rock the boat and vote for [name]Brandon[/name]. It is the most consistent in keeping the with “n” ending, which likely means that it flows well with your last name. Plus, both of the boys would find the commonality of the name ending with their new sibling
Would you consider [name]Brendan[/name]? I think that’s a better choice than [name]Brandon[/name]…
I would suggest sticking with a D name so the third son doesn’t stick out. [name]Devin[/name] and [name]Dylan[/name] and - [name]Declan[/name], donald, david, [name]Dorian[/name], [name]Darren[/name] ETC.
Really like [name]Tyler[/name]! Great name & fits well!