He didn't sign into a hotel as Peter the Great or whatever, but he would go in with a name that wasn't his.

他在酒店登记时不会签彼得大帝之类的名字,而是用一个假名来代替

耶鲁公开课 - 欧洲文明课程节选

Pseudonymous means it's published with a false name, a false author attributed.

笔名的意思是用一个假名发表，以一个假作者的名义。

耶鲁公开课 - 新约课程节选

In 1697 he goes west with the name of Peter Michaeloff.

在1697年他用假名彼得·米哈伊洛夫向西私访

耶鲁公开课 - 欧洲文明课程节选

One thing that he always did when he went on his grand tour is he always took fake names, as if he was signing into a hotel as Mr. and Mrs. John Smith.

当他环游西欧时,他常常使用假名,就好像入住酒店时登记用"张三"或"李四"做名字一样

耶鲁公开课 - 欧洲文明课程节选