Japanese names are rarely rated under 51%, but you've got
Saburou,
Okuninushi,
Juurou and
Takeo.
Most Korean names are rated pretty high, but there's an Awful rated one out there.
I hear that Limburgish (I think) names are rated a bit low.
Most Hmong male names are rated pretty low. They can be difficult to pronounce.
Shona names? Pretty average.
African American names are poorly rated, but there's a few higher rated ones out there.