I mean, okay, but “Oh-sea-an-e-uh” isn’t actually that difficult to remember or pronounce, and “Oceania” isn’t that difficult to spell, so couldn’t your friend just suck it up and use the name they’ve given her, instead of trying to pressure or annoy them out of it? Really, new parents have enough on their plates without a grandparent whining that they don’t like the baby’s name.
Mind you, I think it would be adorable if, when she’s old enough, the little girl and her grandmother agree on her having a special “Grandma nickname” like “Shawna”. Then your friend can use the name she likes, and the granddaughter gets a little nomenclatural variety that she can use as she sees fit in later life, rather than making the baby’s name a bone of family contention before the baby can even pronounce any version of it.
Full name: Equanimeous Tristan Imhotep J. St. Brown.
His brothers:
Amon-Ra Julian Heru J. St. Brown
Osiris Adrian Amon-Ra J. St. Brown
The story goes that their dad, John Brown, a former Mr. Universe, felt his own name was rather ordinary, and wanted his sons to have distinctive names. He succeeded.
If you have a one or two syllable surname, you can get away with a few more syllables in the first name. When both of those names are multipolysyllabic, it can get tiring.
Not to mention that some school forms have fields with a limited number of spaces.