Mysterious/nature names for boys?

[Ginger10]

I love nature/fairy names for girls - Autumn, Faye, Violet, Rowan, Robin, Ivy, etc.

For boys I like names that are similar and a bit mysterious. Don't like Rowan or Robin for a boy! Any ideas? We don't like the names to be unisex for a boy (hence Rowan, Robin, Wren, etc. are all out)

Thank you!

Goodness, what a motley collection of names...

If I wanted a nature name or mythological name (and I really love these kind of names...) I'd probably go for
Oliver
Bertrand
Sylvan
Peregrine
Corvus
Orion
Pembroke
Orrin
Basil
Leo
Leif
Ivan
Yves (not in the U.K.)
Milo

Taliesin
Ragnar

Avalon

Oban

Sea Foam
Sea Cucumber

I know two young boys called Moss.

'don't like Horace either. For some reason it makes me think of all obese cake-lover? not sure why.'

I'm sure there was a cartoon or book character called Hungry Horace.

Hungry Horace was a comic book character.

Ragnar Sea Cucumber would be of a theme I think