How does it work again with the other middle name? Does someone else pick it?
Roland Rain is very very handsome. I love the combination of styles. And Rory is a perfect nickname for it - although I also would really love Ro.
Joscelind is not my style at all, but I feel like it fits very well with your other kids and I like the meaning it has for you, Joscelind Rain is very sweet.
I like the sound of Jossie - but the Joscie spelling is fine with me too.
I might also use
Jo
Jos (pronounced Joss)
Lin
Linni
Lindi - I kinda like this one
Selli
J
J Ray (for the rhymey cutesy baby names)
Three boys nappin', one mama namenerdin'
To peruse my top 100ish names:
http://www.behindthename.com/pnl/82589
"My Inner Birthing Mother Paddles a Canoe" and other non-name musings
found on my blog:
http://jodifriesen.blogspot.ca/2014/07/paddle-power.html