Pardon my dense-ness, but what does the Roll part rhyme with? (I'm so bad at those phonetic pronunciations.)
When I saw
Roland, "Rol" sounds like roll and troll.
That would have been my inclination with Rollan as well - to basically say "rollin'" like "rolling" without the g. So if that's not what you are going for, I'd say that yes, it would be mispronounced often.
Is the "Roll" supposed to rhyme with tall and crawl?
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