I LOVE names and naming things. I especially liked seeing some of those Norse names you threw in there. Always thought Odin would be cute for a one eyed anything. Loki is cute for a green little trouble maker. Violette is a sweet french name that would be adorable for a lavender looking budgie. Aros would be a fantastic name for a blue male budgie as well. Its old norse for "from the rivers mouth" It was ALMOST Milos name but his personality sort of kicked that to the curb. Perhaps you can do another list based on their personalities as well?
I named my Jenday conure Captain Hook because hes a naughty little bird. Super aggressive with most, but me of course. My green cheek's name is Dalai because shes SUPER zen and laid back. Like the Dalai Lama
I think another cute name for a green budgie could be Alvar. Means elf in old Norse and finnish

( and sort of sounds like Oliver which is another adorable name)
Dobby would be SUPER adorable too... I'd teach him to say: "Master has given Dobby a SOCK!!! Dobby is FREEEEE!!":laughing:
Oh, Albus would be an awesome name for a grey male budgie!