Plugin to hide entity nametags unless the entity is visible to the player

It may be easier to find something which hide the entire entity (which should include the name tag) when not visible to the player, e.g. a ray traced anti-xray, which includes entities

https://github.com/tr7zw/EntityCulling_LegacySpigot maybe? might need to be updated

unless you’re talking about the CustomNameVisible behavior vanilla has