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

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