Was trying to upload a post and the system said there is a duplicate and give me post #1974579, but it's not under the name HANUVO.
The source URL in post #1974579 is no longer valid and the artist page https://e621.net/artists/30341 said inactive.

Can't find any evidence about them, Does anyone has some idea?

No... They are different.
Choreuny same as Hyamkeu...
Hanuvo is different.

Though choreuny don't have any new arts recently.
But their style look similar.

jjmao said:
No... They are different.
Choreuny same as Hyamkeu...
Hanuvo is different.

Though choreuny don't have any new arts recently.
But their style look similar.

The thing is Hanuvo upload a pic on his/her pixiv and the same piece was uploaded under the name Choreuny 3 years ago...

watchdog22 said:
The thing is Hanuvo upload a pic on his/her pixiv and the same piece was uploaded under the name Choreuny 3 years ago...

Well you maybe right. They are same artist with different name.
Riroburo is another alternative name.

https://twitter.com/HANUVO69
https://twitter.com/riroburo69

Their twitter arrangement look similar.

So......
Choreuny = Hyamkeu = Riroburo = Hanuvo

Should we create aliases for them in this case?

watchdog22 said:
Should we create aliases for them in this case?

I guess it's not necessary. Each account has different sense of art (as long as you noticed it).
But if you still wanna create aliases it's up to you.