During the pre-Qin period
men were generally addressed as "surname" + "name",
because a person
could have many names. There are different surnames, so
the same person
has many names.
The official residence of the State of Qin is
Ying
, Zhao, so
Qin Shihuang
should be called
Zhao Zheng
,
Qin Zheng
Ying Zheng
The surnames were merged after the unification of Qin Calling method.