For some reason Crosby and Cyrus came to mind, but they might be a totally different style than Reed so not sure why I thought of those. Crosby isn’t specifically Biblical, but it means “town with crosses on a hill”, or something to that effect.
I like @EloiseT ‘s suggestion of Reid and Gideon! they look and sound cohesive without being too matchy matchy. I also like Heath that she suggested.
I like @daisydarcy ‘s suggestion of Adler! Think it would go nicely with Reed.
We have a Clyde who we debated naming Clive, so I like @VEL ‘s suggestion of Clive. (Also using their suggestion of Ransom for a middle).
Instead of Reed, you could do Reeve/Reeves and Clive. Or Reed and Clyde. Clyde is a river in Scotland, I believe, so a subtle nature element to it.
Reed Ransom and Clyde Shepherd would both have subtle nature meanings for the firsts and obscurely Biblical references for the middles.
Reed Ransom F1$her and Clyde Shepherd F1$her
Reed Ransom F1$her and Clive Vincent F1$her
Reed & Crosby
Reed & Crosby Augustine
Reed & Crosby Dempsey
Reed & Crosby Cormac
Edited to add, I guess Reed Ransom wouldn’t be a great combo because it sounds like you are a reading a random letter. 
So just ignore that. Lol