Is Pubert a bad name?

Hi,

So, my cousin is having a baby shortly (final stage) and we know that she is gonna have a boy child.

We wantef something tough, but at the same time something unique

So we came up with "Pubert" (taken from Hubert and Rupert - the brave prince)

This name really grew on her and honestly i think it's a good one too.

But everytime I say this to someone, i either get chuckles or uncomfortable looks. The name even got hated online on namenerds.

Do you'll think it's really bad?

PS: I'm not from an english speaking country