[name]Donovan[/name] and [name]Lincoln[/name] are so cute! [name]Love[/name] those! I think you need a longer FN to go with them, though–I like the suggestion of [name]Callum[/name].
I like [name]Flynn[/name] and [name]Quinn[/name] from your list, too… I think [name]Flynn[/name] [name]David[/name] would be so cute with your boys.
What about:
[name]Anderson[/name]
[name]Silas[/name]
[name]Nathaniel[/name] (maybe a bit too traditional for [name]Donovan[/name] and [name]Lincoln[/name], but I think it works!)
[name]Alistair[/name]
[name]Patrick[/name]
[name]Bennett[/name]
[name]Everett[/name]
[name]Emmett[/name]
[name]Quillan[/name]
[name]Quincy[/name]
[name]Xavier[/name]
[name]Lucian[/name]/[name]Lucien[/name]
[name]Sebastian[/name]
[name]Damien[/name]
[name]August[/name]
[name]Evander[/name]