What names with these siblings?

[CheerfulYank]

I'm not pregnant! Just curious. :) And I want one more at some point

DS1 is Samuel Robert (Sam)
DD is Margaret Rose (Maggie)
DS2 is William Oliver (Will)

What "goes"? I know siblings don't have to match, but I would think it'd be strange to have another and name it Rayleigh or Haddix or something. (Which are kids I know. Damn Americans )

Bonus points for names with A and M. They're DH and my initials and we accidentally called our first 2 names containing those letters. We kept it going for #3. It's not vital but I don't know if another would feel left out without it.

though I like those

I remember your Will thread! I think I suggested Abigail as a girl name but it got horribly slated here.

I still like it.

And boy...um...Elliott?

Katherine and Eleanor. Also Celia or Cecily. Boys are more tricky I think.
What about James or Robert?

Jennifer (Jenny a cute nn like Maggie)