The term "hyakusho," which can also be pronounced "hyakusei" or "omitakara," was originally a word of Chinese origin that indicates all people with a hundred (many) surnames, i.e., all the social class with surnames.
百姓(ひゃくしょう/ひゃくせい/おおみたから）とは、元は百(たくさん）の姓を持つ者たち、すなわち有姓階層全体を指す漢語であった。