Despite his wealth, he's still seen as a pleb in the eyes of the aristocracy.

pleb 是名词，来自拉丁语 plebeius，指"平民、庶民"，特指古罗马时期非贵族阶层的普通公民。在现代英语中常带有贬义，暗指缺乏教养或社会地位低下的人。