Our first - [name_u]Hudson[/name_u] [name_u]James[/name_u] [name_m]Roberts[/name_m]
Second - [name_f]Madelyn[/name_f] [name_f]Rose[/name_f] [name_m]Roberts[/name_m]
Third - on his way in [name_u]June[/name_u]!
We are having a hard time!
[name_f]My[/name_f] wide likes - [name_u]Oliver[/name_u] [name_u]Dean[/name_u] or [name_u]Lincoln[/name_u] David… which do you like? [name_m]Feel[/name_m] free to offer up other first and middle name suggestions.
[name_u]Lincoln[/name_u] [name_m]David[/name_m] is quite nice.
Suggestions:
[name_m]Adam[/name_m] [name_m]Fredrick[/name_m] [name_m]Roberts[/name_m]
[name_u]Dylan[/name_u] [name_u]Avery[/name_u] [name_m]Roberts[/name_m]
[name_u]Lincoln[/name_u] [name_m]David[/name_m] is my favorite–I think [name_u]Hudson[/name_u], [name_f]Madelyn[/name_f], and [name_u]Lincoln[/name_u] are great together! [name_u]Oliver[/name_u] also works, and I like [name_f]Madelyn[/name_f] and [name_u]Oliver[/name_u] together a lot, but I like [name_u]Lincoln[/name_u] best in general, I think.
Others I like with [name_u]Hudson[/name_u] and [name_f]Madelyn[/name_f]:
[name_u]Hudson[/name_u], [name_f]Madelyn[/name_f], and [name_u]Seth[/name_u]
[name_u]Hudson[/name_u], [name_f]Madelyn[/name_f], and [name_u]Theo[/name_u]
[name_u]Hudson[/name_u], [name_f]Madelyn[/name_f], and [name_u]Carson[/name_u]
[name_u]Hudson[/name_u], [name_f]Madelyn[/name_f], and [name_u]Porter[/name_u]
[name_u]Hudson[/name_u], [name_f]Madelyn[/name_f], and [name_u]Bennett[/name_u]
[name_u]Hudson[/name_u], [name_f]Madelyn[/name_f], and [name_u]Declan[/name_u]
[name_u]Hudson[/name_u], [name_f]Madelyn[/name_f], and [name_m]Desmond[/name_m]
[name_u]Hudson[/name_u], [name_f]Madelyn[/name_f], and [name_m]Dominic[/name_m]
[name_u]Hudson[/name_u], [name_f]Madelyn[/name_f], and [name_u]Everett[/name_u]
[name_u]Hudson[/name_u], [name_f]Madelyn[/name_f], and [name_m]Leo[/name_m]
[name_u]Hudson[/name_u], [name_f]Madelyn[/name_f], and [name_u]August[/name_u]
[name_u]Hudson[/name_u], [name_f]Madelyn[/name_f], and [name_u]Landon[/name_u]
[name_u]Hudson[/name_u], [name_f]Madelyn[/name_f], and [name_u]Beau[/name_u]
[name_u]Hudson[/name_u], [name_f]Madelyn[/name_f], and [name_u]Gabriel[/name_u]
[name_u]Hudson[/name_u], [name_f]Madelyn[/name_f], and [name_m]Ian[/name_m]
[name_u]Hudson[/name_u], [name_f]Madelyn[/name_f], and [name_m]Vincent[/name_m]
Good luck!
[name_u]Oliver[/name_u] [name_u]Dean[/name_u] goes perfectly with his siblings! Modern, yet with a classic touch.
I love [name_u]Oliver[/name_u] dean in for you (and in general), it flows better with you surname. 
Lincoln David is very handsome and fits very well with your kids names!!!
other names i like with Hudson and Madelyn:
Roman
Jonah
Salem
Ryland
Wyatt
Derek
Silas
Griffin
Calvin
Elliott
Jude
Percy
Noah
Vance
[name_u]Lincoln[/name_u] [name_m]David[/name_m] is my favorite!
I like both but I love [name_u]Oliver[/name_u] [name_u]Dean[/name_u]. I would personally steer away from getting to matchy with the endings but that’s just me!
I like [name_u]Lincoln[/name_u] [name_m]David[/name_m]. [name_u]Oliver[/name_u] clashes with your last name a little bit since [name_u]Oliver[/name_u] ends in R and [name_m]Roberts[/name_m] begins with it.
I think [name_u]Lincoln[/name_u] work so well with [name_u]Hudson[/name_u].
Other names that strike me as matching your style are:
[name_u]Wyatt[/name_u] [name_u]Finn[/name_u]
[name_u]Emmett[/name_u] [name_m]Henry[/name_m]
[name_u]Owen[/name_u] [name_u]Jude[/name_u]
[name_m]Hamish[/name_m] [name_m]Lewis[/name_m]
[name_u]Oliver[/name_u] [name_u]Dean[/name_u] is perfection! So cute!
I like [name_u]Oliver[/name_u] [name_u]Dean[/name_u].
Maybe you like [name_u]Levi[/name_u] [name_m]Charles[/name_m], [name_m]Lucas[/name_m] [name_m]Henry[/name_m], [name_u]Benjamin[/name_u] [name_m]William[/name_m], [name_u]Daniel[/name_u] [name_m]Alexander[/name_m], [name_u]Owen[/name_u] [name_m]Samuel[/name_m] or [name_u]Julian[/name_u] [name_m]Matthew[/name_m].
[name_u]Lincoln[/name_u] [name_m]David[/name_m] is great!
Of the two you listed I prefer [name_u]Oliver[/name_u] [name_u]Dean[/name_u] and [name_u]Ollie[/name_u] as a nickname is so sweet imo.
I would also like to second the suggestion [name_m]Walden[/name_m] 
. It flows so nicely with your sibset!
Good luck!
[name_u]Lincoln[/name_u] goes with the sibset better.
[name_u]Oliver[/name_u] [name_u]Dean[/name_u] goes with your sibset very well, plus is adorable!
I like [name_u]Lincoln[/name_u] here but both are nice