babynames | (no subject)

I started liking a name recently since last week they had a marathon day of all three Lord of the Rings and it's back on today. I really like Rohan. I don't know about for a first name, tho it goes beautifully with my last if I actually used it. My first son, unless something crazy happens, will most likely be William. Would William and Rohan be a good sib set, or because William is common and Rohan isn't, would it seem odd together? What would be a good name to go with Rohan, first or middle?

A bonus piece of info: While looking up the meaning of Rohan, I found out Bob Marley has a son named Rohan Anthony Marley. Seems a little odd of a combination for me, tho.