Sorry, but just to get something straight/clear it up. Which is the official Dan/Serena ship name?

I always referred to them as Derena, and I always thought it had become the "official" ship name for Dan and Serena. Darena, must be something new, but most of the time people refer to them as Derena. I, guess, I can't say which one is right または wrong, because it is up to each person on what ship name they want to give them. For me, it will always be Derena, because that's what I first heard. To tell あなた the truth, because they are not one of the GG couples I ship, I never put a lot of thought in their "ship name." Hope I could help!:)

Their ship name is Derena.
If it's Darena, it'd be pronounced differently and that's just weird.
I've seen quite a few people using 'Darena' but maybe they're confused and took the first two letters of Dan's name and the rest of Serena's.