Note: sorry for the superhuge pictures on some of the albums: ****ers on ProgArchives apparently never heard of resizing!

I've spoilered them now.
Cressida - Cressida
Took their name from a famous fizzy drink - oh no wait, that was Cresta. Oh well.
Output - Wolfgang Dauner
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Jazz fusion pianist. Why is his album here? **** knows. Maybe I will, once I get to it. Maybe not.
Goliath - Goliath

A grandiose-sounding name for a band who had one album and then folded. Oh well.
Trauma - Gomorra
Very unsure about this one. Both ProgArchives and Discogs say the album was released in 1971, so chances are Wiki got it wrong. German prog band who at least had two albums, whihc puts them ahead of the last few anyway.
Gracious! - Gracious
And this one beats them too, with three albums.
Marsupilami - Marsupilami
Jesus! Where did these bands get their names from? Speaking of…
Moving Gelatine Plates - Moving Gelatine Plates

Another French proto-prog band. Of course they are.
Present From Nancy - Supersister

Not a sister in sight. Nor, indeed, anyone named Nancy.
It’ll All Work Out In Boomland - T2

Sure it will.
Walrus - Walrus

Not to be confused with the seventies prog band Sealion, who did not exist.
Tombstone Valentine - Wigwam
If you think that’s an odd name for an album, their debut was called, ahem,
Hard’n’Horny! Oh, I see! They’re Finnish! Well, that explains it. Oh no wait, it doesn’t.