I don't know if your are interested in or if you have already talked about this, but I have Parma Eldalambron XIII and this issue deals with the early writings of Tolkien and also a (too?) little bit about the etymology chiefs of the house of Gondolin like Rog : it provides us the qenya forms of their names and the names in gnomish and qenya of their houses.
Could it be helpful for you ?
I must admit that I don(t like the circumflex solution because of the persistence of names in -rog as
Torog and
gorog. Moreover the Noldorin World-list gives the entries
rhó 'to arise' and
rhōg 'strength' ; if we choose *Rō, it could be ambiguous.
Can I have please the link to the topic about the change Legolas in Laegolas, I think I won't agree with this solution too, so I want to know the arguments in favor of this decision.
aravanessė