Hill in Irish is cnoc so you can ignore that on straight off (let's pause for a moment and consider how much WEDDING VENDORS are going to know about etymology....I swear I'm just waiting for schooldinnerladies.com to put their list of baby names up on the web)
Exalted Goddess. Am I the only one who has noted that names meaning 'princess' and 'goddess' and 'strong warrior' and such have really taken off since Marlo Thomas did that ridiculous I'm Okay You're Okay book in the 70's? Names that meant 'mud' for centuries now have to mean something like 'Famous and Sensitive Warrior!' Okay...goddess (uncapitalised unless you're refering to a monotheistic Goddess) in French is déesse, exalted is élevée or for a female person, haut placée. So 'exalted goddess' in French is 'déesse haut placée' which bears a remarkable non-resemblance to Brielle.
There's Brielle in Brittany and Brielle in Netherlands, originally Briel. Brielle in Brittany is near one Brie but there are others and the Brittany one isn't the famous cheese-maker, that originally came out of Picardie, east of Paris. Not to say that the good people of Brie in Brittany aren't now producing cheese to cash in on their auspicious town name, just that I don't know if they are and I know that's not where the tradition of Brie originated.
And the elements of Gabriel are bisected in Brielle - 'of God' would be as close as you can get but it's not exactly correct. Will do though.