I type this in vain as I don’t think the entries will ever be ammended. But perhaps this will show up on a search some day and put someone on the right track:
I notice ‘[name]Rumo[/name]’ is included on the (small) list of Cornish names, apparently meaning ‘red’ in Cornish. This is just a rumour 
Rudh is red in Cornish and I checked my Cornish dictionary as well- no [name]Rumo[/name] there. And [name]Mirren[/name] too has no place. Tis an Irish name. [name]Merryn[/name] is the Cornish one.
There are, however, many legit Cornish names with a lot of use that aren’t included at all 