Here are some headcanons for the full names of our favourite Ninjago characters:

1。愛優 美佐子
      (Aiyasa Misako. Meaning of surname - loving and tender)

2。盗賊 浪人
      (Tozoku Ronin. Meaning of surname - Thief)

3。幽霊童 茂呂
      (Yureidou Moro. Meaning of surname - Ghost child)

4。Dareth Brown

5。Acronix Clocksworth

6。Krux Clocksworth

7。泣悲 春美
      (Nakana Harumi. Meaning of surname - Cry, sadness)

8。黒鬼 道武
      (Kurooni Misutake. Meaning of surname - Black oni)

9。精霊 成田間
      (Seirei Nadakan. Meaning of surname - Genie)

And finally...

10。Karloff Alloy Metalfist

LOL

Why did I make all this...