Need help identifying breed of 2 ducks

[DGandC]

I got them as ducklings and thought topknot was a girl,named her Gladys, Know I know it is a drake, so name is TopKnot, or occassionally William.
The other black one I was sure Swedish, and thought it was a boy, named him Swede. Now changed that to Sweedie, as she is laying eggs. But Grey ones. Seem to be getting darker as she grows. She has a white chest, which is not common to cayuga's.
Here are a few pictures. Taken today at 6 months old.
Anybody have a clue on the breed? The brown ducks are Khaki Campbells, and I have one Buff Orpenington. But what are these 2 dark ones. I included a picture of Sweedie's eggs next to 2 white duck eggs.

 

[ChickenGrass]

The black and white one looks like a Swedish duck?
And I think the one with fluff on its head is a crested duck
Goodluck

 

[DGandC]

Thanks. I didn't think that swedish laid grey eggs, thought that was only cayuga.
But I did more research after your comment and found that Black Swedish can sometimes lay grey eggs,
As for TopKnot. I know he is a crested duck, just not sure what breed. Crested ducks can show up in most breeds from what I see.
Could he be a crested Black Swedish? Or Blue Swedish? or another breed altogether? Starting to think he may be black swedish, too,

 

[ChickenGrass]

hi there
thankfully we know what 1 breed is.
As for the crested on I am not sure.
Maybe someone else can help with that one.
goodluck.

 

[GoldenFlight]

I would say that TopKnot is a crested Blue Swedish and Sweetie is a Black Swedish.
Here's a link to another thread that has a pic of Black Swedish eggs. https://www.backyardchickens.com/t/429457/duck-egg-colors-your-input-needed/40