It's quite a nice name, with a pleasant sound (and it looks and sounds like Claddagh!), but it has a few drawbacks for me.
# I'm not a fan of unnecessary gh's at the end of names. They look fake-Irish to me. I'd prefer Úna to
Oonagh anyday, and with
Clodagh, I have to resist the urge to say klo-dakh. Perhaps if I Irish-ised the spelling to Clóda, it be nicer, but I'm not sure if that's a legit spelling.
# It gets nice nicknames, like Clodie, but don't shorten it to Clo. Clo is pronounced like Klo, the
German word for toliet.
# I can't find a meaning for it, and I'd only use names that have meanings. I know the name comes from Clodaigh, which is a river in Tipperary, but I can't find a meaning for Clodaigh either. Anyone know the meaning?
On the whole, it's a pretty name, and maybe I would use the form Clóda as a middle name someday.