Who are they?

Having a clear-out, so I decided to scrap a tatty old frame which had a cheap repro print of an early world map – sea monsters, mermaids, zodiac signs, every continent awfully wonky and Australia missing… You get the idea.
But behind the print…

As found… Keep scrolling down
As above with some manipulation. Keep scrolling…
Skewed one way to remove most of the silver glare. What a severe haircut the girl has! Keep scrolling…
Skewed the other way. Funnily enough, the group all appear to have been looking this way: I think the girl’s eyes and possibly others’ are touched in, not just details of the clothing.
Next post: will do my best to bring up the very faint writing on the back.