雷帝是怎么翻过来的，这头衔独一份。俄文不懂，英文 Ivan the Terrible， Ivan the Fearsome，Ivan the Formidable 也跟雷没关系。

貌似官方说法是因为残暴？

1530年8月25日，伊凡四世出生。他的母亲叶莲娜·格林斯卡娅是金帐汗国（1219—1502年）贵族马麦后裔，嫁给了年近50仍未有子嗣的瓦西里三世(Vasili III)之后，终于生下了继承人。伊凡四世出生时正好电闪雷鸣，因此被称为伊凡雷帝，但他这个名字恐怕更主要来源于后来一次次令人震破胆的大清洗。

WIKI关于绰号由来的解释，同时解释了terrible在此处的形容正确解释

The English word terrible is usually used to translate the Russian word grozny in Ivan's nickname, but this is a somewhat archaic translation. The Russian word grozny reflects the older English usage of terrible as in "inspiring fear or terror; dangerous; powerful; formidable". It does not convey the more modern connotations of English terrible, such as "defective" or "evil". Vladimir Dal defines grozny specifically in archaic usage and as an epithet for tsars: "courageous, magnificent, magisterial and keeping enemies in fear, but people in obedience".[6] Other translations have also been suggested by modern scholars.[7][8][9]

不是恐怖伊万么

现在叫铁西瓜.

相当于谥号

可能因为是任天堂爱好者

听起来跟雷帝嘎嘎一样

应该是因为马甲多，拥护任地狱。