I noticed I cannot edit my post, so here is an extra post with a touched up town icons, including Finrod's symbol Galendae asked about. I gave him as a symbol a variation on a star since all the original designs for the Noldor, including the Star of Fëanor visible in the LotR on the Doors of Durin (Moria), are variations on the Silmarils and their light. Still it is just a decoration not an emblem designed by JRRT (which in fact is weird compared to the rest of the Noldorin symbols, here they are).
Click image for larger version. 

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