Big congrats!
I’m sure there are a number of winning combinations, but here are some I like (and as a twin who is against matchy-matchy but I get you want some stylistic connection there):
Reed/Reid* & Callum
Reid & Gideon
Reid & Calvin
Jasper & Heath
Jasper & Silas
Callum & Jasper
Jock & Vance
Elias/Elijah & Jude
Jude & Silas
Harrison & Wyatt
I don’t really warm to Clay or Brock myself and while I’d not belly go for Clay of the two, I might pick Brock with your last name so doesn’t sound like cray fish*ng or anything closer to that.
I wonder whether - with your last name - Reid instead of Reed might be better meaning-wise and it’s less descriptive if you choose Reid & Clay - “Clay coloured reeds in the water with a fsher nearby” etc. Obviously ignore if you only like the Reed spelling and I’m putting these names through the stress test, but I would at least consider switching to Reid.
Hope this helps! 