Minecraft-heads.com where is the player name from the head?

I play on griefergames and would like to have a lot of heads / heads made by Minecraft-heads.com, but if I e.g. On the head of bucket of water there's no player name (for my head) and if I enter / head bucket of water or something like that: enter a player name. White jmd where the name of the player is on the side.

I'd be happy for help

Only go to the head on the link go to the link go to a head go to the bottom and there's the name

https://minecraft-heads.com/player-heads